Covid ICYMI

In early September, about a week after recovering from COVID-19, Barri Sanders went to the bank to pay a bill. But by mistake, she transferred a large amount of money from the wrong account.

“I’m talking about $20,000,” she said. “I had to go back [later] and fix it.”

Ms. Sanders, 83, had not had confusion like that before. Suddenly, the Albuquerque, N.M., resident found herself looking up from a book and not remembering what she had just read. She would stand up from her chair and forget what she meant to do.

“I kind of thought it was just the aging process,” she said. Combined with sudden balance issues, insomnia, and a nagging postnasal drip, the overall effect was “subtle, but scary,” she said.

After 5 days of this, she went to bed and slept the whole night through. She woke up in the morning to find her balanced restored, her sinuses clear, and the mental fog gone. What she’d had, she realized, wasn’t a rapid start of dementia, but rather a mercifully short form of long COVID.

Somewhere between 22% and 32% of people who recover from COVID-19 get “brain fog,” a nonscientific term used to describe slow or sluggish thinking. While this is disturbing at any age, it can be particularly upsetting to older patients and their caregivers, who fear they’re having or witnessing not just an after-effect of a disease, but the start of a permanent loss of thinking skills. And some scientists are starting to confirm what doctors, patients, and their families can already see: Older patients who have had COVID-19 have a higher risk of getting dementia or, if they already have mental confusion, the illness may worsen their condition.

British scientists who studied medical records from around the world reported in the journal The Lancet Psychiatry that people who recovered from COVID-19 had a higher risk of problems with their thinking and dementia even after 2 years had passed.

Another 2022 study, published in JAMA Neurology, looked at older COVID-19 patients for a year after they were discharged from hospitals in Wuhan, China. Compared with uninfected people, those who survived a severe case of COVID-19 were at higher risk for early onset, late-onset, and progressive decline in their thinking skills. Those who survived a mild infection were at a higher risk for early onset decline, the study found.

Eran Metzger, MD, assistant professor of psychiatry at Beth Israel Deaconess Medical Center in Boston, said he’s noticed that COVID-19 makes some older patients confused, and their brains don’t regain their former clarity.

“We see a stepwise decline in their cognition during the COVID episode, and then they never get back up to their baseline,” said Dr. Metzger, medical director at Hebrew SeniorLife.

New research is beginning to back up such findings.

People who got COVID-19 were twice as likely to receive a diagnosis of Alzheimer’s disease in the 12 months after infection, compared to those who didn’t get COVID, according to a study published in the journal Nature Medicine , which analyzed the health care databases of the U.S. Department of Veterans Affairs.

Joshua Cahan, MD, a cognitive neurologist at Northwestern University, Chicago, advises caution about applying such a specific label simply from a patient’s medical chart. After all, he noted, few patients get tested to confirm that they have the proteins linked to Alzheimer’s.

“Probably the most appropriate conclusion from that is that there’s an increased risk of dementia after a COVID infection,” he said, “but we don’t know whether it’s truly Alzheimer’s disease or not.”

There could be a number of reasons why COVID-19 triggers a decline in thinking skills, says Michelle Monje, MD, a neuroscientist and neuro-oncologist at Stanford (Calif.) University.

In a paper published in the journal Neuron, Dr. Monje and her coauthor, Akiko Iwasaki, PhD, professor of immunobiology at Yale University, New Haven, Conn., propose possible triggers for brain fog caused by COVID: inflammation in the lungs and respiratory passages that leads to inflammation and dysregulation of the central nervous system; autoimmune reactions that damage the central nervous system; brain infection directly caused by the coronavirus (though, they note, this appears rare); a reactivation of an Epstein-Barr virus, which can lead to neuroinflammation; triggered by the coronavirus; and/or complications from severe cases of COVID-19, possibly involving periods of low blood oxygen and multi-organ failure.

Scientific understanding of brain fog is “part of an emerging picture that inflammation elsewhere in the body can be transmitted to become inflammation in the brain,” Dr. Monje said. “And once there’s inflammation in the brain … that can dysregulate other cell types that normally support healthy cognitive function.”

One issue with the concept of brain fog is that, like the term itself, the condition can be tough to define for doctors and patients alike and difficult, if not impossible, to capture on common cognition tests.

These days, patients often arrive at the Center of Excellence for Alzheimer’s Disease, in Syracuse, N.Y., complaining that they “don’t feel the same” as they did before contracting COVID-19, said Sharon Brangman, MD, the center’s director and the chair of the geriatrics department at Upstate Medical University.

But the evidence of diminished cognition just isn’t there.

“There’s nothing that we can find, objectively, that’s wrong with them,” she said. “They’re not severe enough to score low on mental status testing.”

But specialized, directed testing can find some probable signs, said Dr. Cahan, who evaluates patient cognition in a long COVID clinic at Northwestern University.

He often finds that his long COVID patients score in the low normal range on cognitive testing.

“Patients do have a complaint that something’s changed, and we don’t have prior testing,” he said. “So it’s possible that they were maybe in the high normal range or the superior range, but you just don’t know.”

He said he has seen very high-performing people, such as lawyers, executives, PhDs, and other professionals, who have tests that might be interpreted as normal, but given their level of achievement, “you would expect [higher scores].”

Like Ms. Sanders, many of those who do have muddled thinking after a COVID infection return to their former mental status. A study published in the journal Brain Communications  found that people who had recovered from COVID-19, even if they had a mild illness, were significantly more likely to have memory and other cognition issues in the months after infection. But after 9 months, the former COVID patients had returned to their normal level of cognition, the team at Britain’s University of Oxford reported.

Notably, though, the average age of the people in the study was 28.6.

At the Northwestern clinic, Dr. Cahan treats patients who have struggled with COVID-induced cognition issues for months or even years. A rehabilitation program involves working with patients to come up with ways to compensate for cognitive deficits – such as making lists – as well as brain exercises, Dr. Cahan said. Over time, patients may achieve a 75% to 85% improvement, he said.

Dr. Monje hopes that one day, science will come up with ways to fully reverse the decline.

“I think what is likely the most common contributor to brain fog is this neuroinflammation, causing dysfunction of other cell types,” she said. “And, at least in the laboratory, we can rescue that in mouse models of chemotherapy brain fog, which gives me hope that we can rescue that for people.”
 

A version of this article first appeared on WebMD.com.

In early September, about a week after recovering from COVID-19, Barri Sanders went to the bank to pay a bill. But by mistake, she transferred a large amount of money from the wrong account.

“I’m talking about $20,000,” she said. “I had to go back [later] and fix it.”

Ms. Sanders, 83, had not had confusion like that before. Suddenly, the Albuquerque, N.M., resident found herself looking up from a book and not remembering what she had just read. She would stand up from her chair and forget what she meant to do.

“I kind of thought it was just the aging process,” she said. Combined with sudden balance issues, insomnia, and a nagging postnasal drip, the overall effect was “subtle, but scary,” she said.

After 5 days of this, she went to bed and slept the whole night through. She woke up in the morning to find her balanced restored, her sinuses clear, and the mental fog gone. What she’d had, she realized, wasn’t a rapid start of dementia, but rather a mercifully short form of long COVID.

Somewhere between 22% and 32% of people who recover from COVID-19 get “brain fog,” a nonscientific term used to describe slow or sluggish thinking. While this is disturbing at any age, it can be particularly upsetting to older patients and their caregivers, who fear they’re having or witnessing not just an after-effect of a disease, but the start of a permanent loss of thinking skills. And some scientists are starting to confirm what doctors, patients, and their families can already see: Older patients who have had COVID-19 have a higher risk of getting dementia or, if they already have mental confusion, the illness may worsen their condition.

British scientists who studied medical records from around the world reported in the journal The Lancet Psychiatry that people who recovered from COVID-19 had a higher risk of problems with their thinking and dementia even after 2 years had passed.

Another 2022 study, published in JAMA Neurology, looked at older COVID-19 patients for a year after they were discharged from hospitals in Wuhan, China. Compared with uninfected people, those who survived a severe case of COVID-19 were at higher risk for early onset, late-onset, and progressive decline in their thinking skills. Those who survived a mild infection were at a higher risk for early onset decline, the study found.

Eran Metzger, MD, assistant professor of psychiatry at Beth Israel Deaconess Medical Center in Boston, said he’s noticed that COVID-19 makes some older patients confused, and their brains don’t regain their former clarity.

“We see a stepwise decline in their cognition during the COVID episode, and then they never get back up to their baseline,” said Dr. Metzger, medical director at Hebrew SeniorLife.

New research is beginning to back up such findings.

People who got COVID-19 were twice as likely to receive a diagnosis of Alzheimer’s disease in the 12 months after infection, compared to those who didn’t get COVID, according to a study published in the journal Nature Medicine , which analyzed the health care databases of the U.S. Department of Veterans Affairs.

Joshua Cahan, MD, a cognitive neurologist at Northwestern University, Chicago, advises caution about applying such a specific label simply from a patient’s medical chart. After all, he noted, few patients get tested to confirm that they have the proteins linked to Alzheimer’s.

“Probably the most appropriate conclusion from that is that there’s an increased risk of dementia after a COVID infection,” he said, “but we don’t know whether it’s truly Alzheimer’s disease or not.”

There could be a number of reasons why COVID-19 triggers a decline in thinking skills, says Michelle Monje, MD, a neuroscientist and neuro-oncologist at Stanford (Calif.) University.

In a paper published in the journal Neuron, Dr. Monje and her coauthor, Akiko Iwasaki, PhD, professor of immunobiology at Yale University, New Haven, Conn., propose possible triggers for brain fog caused by COVID: inflammation in the lungs and respiratory passages that leads to inflammation and dysregulation of the central nervous system; autoimmune reactions that damage the central nervous system; brain infection directly caused by the coronavirus (though, they note, this appears rare); a reactivation of an Epstein-Barr virus, which can lead to neuroinflammation; triggered by the coronavirus; and/or complications from severe cases of COVID-19, possibly involving periods of low blood oxygen and multi-organ failure.

Scientific understanding of brain fog is “part of an emerging picture that inflammation elsewhere in the body can be transmitted to become inflammation in the brain,” Dr. Monje said. “And once there’s inflammation in the brain … that can dysregulate other cell types that normally support healthy cognitive function.”

One issue with the concept of brain fog is that, like the term itself, the condition can be tough to define for doctors and patients alike and difficult, if not impossible, to capture on common cognition tests.

These days, patients often arrive at the Center of Excellence for Alzheimer’s Disease, in Syracuse, N.Y., complaining that they “don’t feel the same” as they did before contracting COVID-19, said Sharon Brangman, MD, the center’s director and the chair of the geriatrics department at Upstate Medical University.

But the evidence of diminished cognition just isn’t there.

“There’s nothing that we can find, objectively, that’s wrong with them,” she said. “They’re not severe enough to score low on mental status testing.”

But specialized, directed testing can find some probable signs, said Dr. Cahan, who evaluates patient cognition in a long COVID clinic at Northwestern University.

He often finds that his long COVID patients score in the low normal range on cognitive testing.

“Patients do have a complaint that something’s changed, and we don’t have prior testing,” he said. “So it’s possible that they were maybe in the high normal range or the superior range, but you just don’t know.”

He said he has seen very high-performing people, such as lawyers, executives, PhDs, and other professionals, who have tests that might be interpreted as normal, but given their level of achievement, “you would expect [higher scores].”

Like Ms. Sanders, many of those who do have muddled thinking after a COVID infection return to their former mental status. A study published in the journal Brain Communications  found that people who had recovered from COVID-19, even if they had a mild illness, were significantly more likely to have memory and other cognition issues in the months after infection. But after 9 months, the former COVID patients had returned to their normal level of cognition, the team at Britain’s University of Oxford reported.

Notably, though, the average age of the people in the study was 28.6.

At the Northwestern clinic, Dr. Cahan treats patients who have struggled with COVID-induced cognition issues for months or even years. A rehabilitation program involves working with patients to come up with ways to compensate for cognitive deficits – such as making lists – as well as brain exercises, Dr. Cahan said. Over time, patients may achieve a 75% to 85% improvement, he said.

Dr. Monje hopes that one day, science will come up with ways to fully reverse the decline.

“I think what is likely the most common contributor to brain fog is this neuroinflammation, causing dysfunction of other cell types,” she said. “And, at least in the laboratory, we can rescue that in mouse models of chemotherapy brain fog, which gives me hope that we can rescue that for people.”
 

A version of this article first appeared on WebMD.com.

In early September, about a week after recovering from COVID-19, Barri Sanders went to the bank to pay a bill. But by mistake, she transferred a large amount of money from the wrong account.

“I’m talking about $20,000,” she said. “I had to go back [later] and fix it.”

Ms. Sanders, 83, had not had confusion like that before. Suddenly, the Albuquerque, N.M., resident found herself looking up from a book and not remembering what she had just read. She would stand up from her chair and forget what she meant to do.

“I kind of thought it was just the aging process,” she said. Combined with sudden balance issues, insomnia, and a nagging postnasal drip, the overall effect was “subtle, but scary,” she said.

After 5 days of this, she went to bed and slept the whole night through. She woke up in the morning to find her balanced restored, her sinuses clear, and the mental fog gone. What she’d had, she realized, wasn’t a rapid start of dementia, but rather a mercifully short form of long COVID.

Somewhere between 22% and 32% of people who recover from COVID-19 get “brain fog,” a nonscientific term used to describe slow or sluggish thinking. While this is disturbing at any age, it can be particularly upsetting to older patients and their caregivers, who fear they’re having or witnessing not just an after-effect of a disease, but the start of a permanent loss of thinking skills. And some scientists are starting to confirm what doctors, patients, and their families can already see: Older patients who have had COVID-19 have a higher risk of getting dementia or, if they already have mental confusion, the illness may worsen their condition.

British scientists who studied medical records from around the world reported in the journal The Lancet Psychiatry that people who recovered from COVID-19 had a higher risk of problems with their thinking and dementia even after 2 years had passed.

Another 2022 study, published in JAMA Neurology, looked at older COVID-19 patients for a year after they were discharged from hospitals in Wuhan, China. Compared with uninfected people, those who survived a severe case of COVID-19 were at higher risk for early onset, late-onset, and progressive decline in their thinking skills. Those who survived a mild infection were at a higher risk for early onset decline, the study found.

Eran Metzger, MD, assistant professor of psychiatry at Beth Israel Deaconess Medical Center in Boston, said he’s noticed that COVID-19 makes some older patients confused, and their brains don’t regain their former clarity.

“We see a stepwise decline in their cognition during the COVID episode, and then they never get back up to their baseline,” said Dr. Metzger, medical director at Hebrew SeniorLife.

New research is beginning to back up such findings.

People who got COVID-19 were twice as likely to receive a diagnosis of Alzheimer’s disease in the 12 months after infection, compared to those who didn’t get COVID, according to a study published in the journal Nature Medicine , which analyzed the health care databases of the U.S. Department of Veterans Affairs.

Joshua Cahan, MD, a cognitive neurologist at Northwestern University, Chicago, advises caution about applying such a specific label simply from a patient’s medical chart. After all, he noted, few patients get tested to confirm that they have the proteins linked to Alzheimer’s.

“Probably the most appropriate conclusion from that is that there’s an increased risk of dementia after a COVID infection,” he said, “but we don’t know whether it’s truly Alzheimer’s disease or not.”

There could be a number of reasons why COVID-19 triggers a decline in thinking skills, says Michelle Monje, MD, a neuroscientist and neuro-oncologist at Stanford (Calif.) University.

In a paper published in the journal Neuron, Dr. Monje and her coauthor, Akiko Iwasaki, PhD, professor of immunobiology at Yale University, New Haven, Conn., propose possible triggers for brain fog caused by COVID: inflammation in the lungs and respiratory passages that leads to inflammation and dysregulation of the central nervous system; autoimmune reactions that damage the central nervous system; brain infection directly caused by the coronavirus (though, they note, this appears rare); a reactivation of an Epstein-Barr virus, which can lead to neuroinflammation; triggered by the coronavirus; and/or complications from severe cases of COVID-19, possibly involving periods of low blood oxygen and multi-organ failure.

Scientific understanding of brain fog is “part of an emerging picture that inflammation elsewhere in the body can be transmitted to become inflammation in the brain,” Dr. Monje said. “And once there’s inflammation in the brain … that can dysregulate other cell types that normally support healthy cognitive function.”

One issue with the concept of brain fog is that, like the term itself, the condition can be tough to define for doctors and patients alike and difficult, if not impossible, to capture on common cognition tests.

These days, patients often arrive at the Center of Excellence for Alzheimer’s Disease, in Syracuse, N.Y., complaining that they “don’t feel the same” as they did before contracting COVID-19, said Sharon Brangman, MD, the center’s director and the chair of the geriatrics department at Upstate Medical University.

But the evidence of diminished cognition just isn’t there.

“There’s nothing that we can find, objectively, that’s wrong with them,” she said. “They’re not severe enough to score low on mental status testing.”

But specialized, directed testing can find some probable signs, said Dr. Cahan, who evaluates patient cognition in a long COVID clinic at Northwestern University.

He often finds that his long COVID patients score in the low normal range on cognitive testing.

“Patients do have a complaint that something’s changed, and we don’t have prior testing,” he said. “So it’s possible that they were maybe in the high normal range or the superior range, but you just don’t know.”

He said he has seen very high-performing people, such as lawyers, executives, PhDs, and other professionals, who have tests that might be interpreted as normal, but given their level of achievement, “you would expect [higher scores].”

Like Ms. Sanders, many of those who do have muddled thinking after a COVID infection return to their former mental status. A study published in the journal Brain Communications  found that people who had recovered from COVID-19, even if they had a mild illness, were significantly more likely to have memory and other cognition issues in the months after infection. But after 9 months, the former COVID patients had returned to their normal level of cognition, the team at Britain’s University of Oxford reported.

Notably, though, the average age of the people in the study was 28.6.

At the Northwestern clinic, Dr. Cahan treats patients who have struggled with COVID-induced cognition issues for months or even years. A rehabilitation program involves working with patients to come up with ways to compensate for cognitive deficits – such as making lists – as well as brain exercises, Dr. Cahan said. Over time, patients may achieve a 75% to 85% improvement, he said.

Dr. Monje hopes that one day, science will come up with ways to fully reverse the decline.

“I think what is likely the most common contributor to brain fog is this neuroinflammation, causing dysfunction of other cell types,” she said. “And, at least in the laboratory, we can rescue that in mouse models of chemotherapy brain fog, which gives me hope that we can rescue that for people.”
 

A version of this article first appeared on WebMD.com.

For the first time, the majority of people dying from COVID-19 in America have been vaccinated.

“We can no longer say this is a pandemic of the unvaccinated,” Kaiser Family Foundation Vice President Cynthia Cox, who conducted the analysis, told The Washington Post.

People who had been vaccinated or boosted made up 58% of COVID-19 deaths in August, the analysis showed. The rate has been on the rise: 23% of coronavirus deaths were among vaccinated people in September 2021, and the vaccinated made up 42% of deaths in January and February 2022, the Post reported.

Research continues to show that people who are vaccinated or boosted have a lower risk of death. The rise in deaths among the vaccinated is the result of three factors, Ms. Cox said.

• A large majority of people in the United States have been vaccinated (267 million people, the  said).
• People who are at the greatest risk of dying from COVID-19 are more likely to be vaccinated and boosted, such as the elderly.
• Vaccines lose their effectiveness over time; the virus changes to avoid vaccines; and people need to choose to get boosters to continue to be protected.

The case for the effectiveness of vaccines and boosters versus skipping the shots remains strong. People age 6 months and older who are unvaccinated are six times more likely to die of COVID-19, compared to those who got the primary series of shots, the Post reported. Survival rates were even better with additional booster shots, particularly among older people.

“I feel very confident that if people continue to get vaccinated at good numbers, if people get boosted, we can absolutely have a very safe and healthy holiday season,” Ashish Jha, White House coronavirus czar, said on Nov. 22.

The number of Americans who have gotten the most recent booster has been increasing ahead of the holidays. CDC data show that 12% of the U.S. population age 5 and older has received a booster.

A new study by a team of researchers from Harvard University and Yale University estimates that 94% of the U.S. population has been infected with COVID-19 at least once, leaving just 1 in 20 people who have never had the virus.

“Despite these high exposure numbers, there is still substantial population susceptibility to infection with an Omicron variant,” the authors wrote.

They said that if all states achieved the vaccination levels of Vermont, where 55% of people had at least one booster and 22% got a second one, there would be “an appreciable improvement in population immunity, with greater relative impact for protection against infection versus severe disease. This additional protection results from both the recovery of immunity lost due to waning and the increased effectiveness of the bivalent booster against Omicron infections.”

A version of this article first appeared on WebMD.com.

For the first time, the majority of people dying from COVID-19 in America have been vaccinated.

“We can no longer say this is a pandemic of the unvaccinated,” Kaiser Family Foundation Vice President Cynthia Cox, who conducted the analysis, told The Washington Post.

People who had been vaccinated or boosted made up 58% of COVID-19 deaths in August, the analysis showed. The rate has been on the rise: 23% of coronavirus deaths were among vaccinated people in September 2021, and the vaccinated made up 42% of deaths in January and February 2022, the Post reported.

Research continues to show that people who are vaccinated or boosted have a lower risk of death. The rise in deaths among the vaccinated is the result of three factors, Ms. Cox said.

• A large majority of people in the United States have been vaccinated (267 million people, the  said).
• People who are at the greatest risk of dying from COVID-19 are more likely to be vaccinated and boosted, such as the elderly.
• Vaccines lose their effectiveness over time; the virus changes to avoid vaccines; and people need to choose to get boosters to continue to be protected.

The case for the effectiveness of vaccines and boosters versus skipping the shots remains strong. People age 6 months and older who are unvaccinated are six times more likely to die of COVID-19, compared to those who got the primary series of shots, the Post reported. Survival rates were even better with additional booster shots, particularly among older people.

“I feel very confident that if people continue to get vaccinated at good numbers, if people get boosted, we can absolutely have a very safe and healthy holiday season,” Ashish Jha, White House coronavirus czar, said on Nov. 22.

The number of Americans who have gotten the most recent booster has been increasing ahead of the holidays. CDC data show that 12% of the U.S. population age 5 and older has received a booster.

A new study by a team of researchers from Harvard University and Yale University estimates that 94% of the U.S. population has been infected with COVID-19 at least once, leaving just 1 in 20 people who have never had the virus.

“Despite these high exposure numbers, there is still substantial population susceptibility to infection with an Omicron variant,” the authors wrote.

They said that if all states achieved the vaccination levels of Vermont, where 55% of people had at least one booster and 22% got a second one, there would be “an appreciable improvement in population immunity, with greater relative impact for protection against infection versus severe disease. This additional protection results from both the recovery of immunity lost due to waning and the increased effectiveness of the bivalent booster against Omicron infections.”

A version of this article first appeared on WebMD.com.

For the first time, the majority of people dying from COVID-19 in America have been vaccinated.

“We can no longer say this is a pandemic of the unvaccinated,” Kaiser Family Foundation Vice President Cynthia Cox, who conducted the analysis, told The Washington Post.

People who had been vaccinated or boosted made up 58% of COVID-19 deaths in August, the analysis showed. The rate has been on the rise: 23% of coronavirus deaths were among vaccinated people in September 2021, and the vaccinated made up 42% of deaths in January and February 2022, the Post reported.

Research continues to show that people who are vaccinated or boosted have a lower risk of death. The rise in deaths among the vaccinated is the result of three factors, Ms. Cox said.

• A large majority of people in the United States have been vaccinated (267 million people, the  said).
• People who are at the greatest risk of dying from COVID-19 are more likely to be vaccinated and boosted, such as the elderly.
• Vaccines lose their effectiveness over time; the virus changes to avoid vaccines; and people need to choose to get boosters to continue to be protected.

The case for the effectiveness of vaccines and boosters versus skipping the shots remains strong. People age 6 months and older who are unvaccinated are six times more likely to die of COVID-19, compared to those who got the primary series of shots, the Post reported. Survival rates were even better with additional booster shots, particularly among older people.

“I feel very confident that if people continue to get vaccinated at good numbers, if people get boosted, we can absolutely have a very safe and healthy holiday season,” Ashish Jha, White House coronavirus czar, said on Nov. 22.

The number of Americans who have gotten the most recent booster has been increasing ahead of the holidays. CDC data show that 12% of the U.S. population age 5 and older has received a booster.

A new study by a team of researchers from Harvard University and Yale University estimates that 94% of the U.S. population has been infected with COVID-19 at least once, leaving just 1 in 20 people who have never had the virus.

“Despite these high exposure numbers, there is still substantial population susceptibility to infection with an Omicron variant,” the authors wrote.

They said that if all states achieved the vaccination levels of Vermont, where 55% of people had at least one booster and 22% got a second one, there would be “an appreciable improvement in population immunity, with greater relative impact for protection against infection versus severe disease. This additional protection results from both the recovery of immunity lost due to waning and the increased effectiveness of the bivalent booster against Omicron infections.”

A version of this article first appeared on WebMD.com.

While having proper indoor ventilation is recognized as a way to reduce the spread of COVID-19, a new study from MIT says maintaining the proper relative humidity in indoor spaces like your residence might help keep you healthy.

The “sweet spot” associated with reduced COVID-19 cases and deaths is 40%-60% indoor relative humidity, an MIT news release said. People who maintained indoor relative humidity outside those parameters had higher rates of catching COVID-19. 

Most people are comfortable with 30%-50% relative humidity, researchers said. An airplane cabin has about 20% relative humidity.

Relative humidity is the amount of moisture in the air, compared with the total moisture the air can hold at a given temperature before saturating and forming condensation.

The study was published in The Journal of the Royal Society Interface. Researchers examined COVID-19 data and meteorological measurements from 121 countries from January 2020 through August 2020, before vaccines became available to the public. 

“When outdoor temperatures were below the typical human comfort range, they assumed indoor spaces were heated to reach that comfort range. Based on the added heating, they calculated the associated drop in indoor relative humidity,” the MIT news release said.

The research teams found that when a region reported a rise in COVID-19 cases and deaths, the region’s estimated indoor relative humidity was either lower than 40% or higher than 60%, the release said. 

“There’s potentially a protective effect of this intermediate indoor relative humidity,” said Connor Verheyen, the lead author and a PhD student in medical engineering and medical physics in the Harvard-MIT Program in Health Sciences and Technology.

Widespread use of the 40%-60% indoor humidity range could reduce the need for lockdowns and other widespread restrictions, the study concluded.

“Unlike measures that depend on individual compliance (for example, masking or hand-washing), indoor RH optimization would achieve high compliance because all occupants of a common indoor space would be exposed to similar ambient conditions,” the study said. “Compared to the long timelines and high costs of vaccine production and distribution, humidity control systems could potentially be implemented more quickly and cheaply in certain indoor settings.”

A version of this article first appeared on WebMD.com.

While having proper indoor ventilation is recognized as a way to reduce the spread of COVID-19, a new study from MIT says maintaining the proper relative humidity in indoor spaces like your residence might help keep you healthy.

The “sweet spot” associated with reduced COVID-19 cases and deaths is 40%-60% indoor relative humidity, an MIT news release said. People who maintained indoor relative humidity outside those parameters had higher rates of catching COVID-19. 

Most people are comfortable with 30%-50% relative humidity, researchers said. An airplane cabin has about 20% relative humidity.

Relative humidity is the amount of moisture in the air, compared with the total moisture the air can hold at a given temperature before saturating and forming condensation.

The study was published in The Journal of the Royal Society Interface. Researchers examined COVID-19 data and meteorological measurements from 121 countries from January 2020 through August 2020, before vaccines became available to the public. 

“When outdoor temperatures were below the typical human comfort range, they assumed indoor spaces were heated to reach that comfort range. Based on the added heating, they calculated the associated drop in indoor relative humidity,” the MIT news release said.

The research teams found that when a region reported a rise in COVID-19 cases and deaths, the region’s estimated indoor relative humidity was either lower than 40% or higher than 60%, the release said. 

“There’s potentially a protective effect of this intermediate indoor relative humidity,” said Connor Verheyen, the lead author and a PhD student in medical engineering and medical physics in the Harvard-MIT Program in Health Sciences and Technology.

Widespread use of the 40%-60% indoor humidity range could reduce the need for lockdowns and other widespread restrictions, the study concluded.

“Unlike measures that depend on individual compliance (for example, masking or hand-washing), indoor RH optimization would achieve high compliance because all occupants of a common indoor space would be exposed to similar ambient conditions,” the study said. “Compared to the long timelines and high costs of vaccine production and distribution, humidity control systems could potentially be implemented more quickly and cheaply in certain indoor settings.”

A version of this article first appeared on WebMD.com.

While having proper indoor ventilation is recognized as a way to reduce the spread of COVID-19, a new study from MIT says maintaining the proper relative humidity in indoor spaces like your residence might help keep you healthy.

The “sweet spot” associated with reduced COVID-19 cases and deaths is 40%-60% indoor relative humidity, an MIT news release said. People who maintained indoor relative humidity outside those parameters had higher rates of catching COVID-19. 

Most people are comfortable with 30%-50% relative humidity, researchers said. An airplane cabin has about 20% relative humidity.

Relative humidity is the amount of moisture in the air, compared with the total moisture the air can hold at a given temperature before saturating and forming condensation.

The study was published in The Journal of the Royal Society Interface. Researchers examined COVID-19 data and meteorological measurements from 121 countries from January 2020 through August 2020, before vaccines became available to the public. 

“When outdoor temperatures were below the typical human comfort range, they assumed indoor spaces were heated to reach that comfort range. Based on the added heating, they calculated the associated drop in indoor relative humidity,” the MIT news release said.

The research teams found that when a region reported a rise in COVID-19 cases and deaths, the region’s estimated indoor relative humidity was either lower than 40% or higher than 60%, the release said. 

“There’s potentially a protective effect of this intermediate indoor relative humidity,” said Connor Verheyen, the lead author and a PhD student in medical engineering and medical physics in the Harvard-MIT Program in Health Sciences and Technology.

Widespread use of the 40%-60% indoor humidity range could reduce the need for lockdowns and other widespread restrictions, the study concluded.

“Unlike measures that depend on individual compliance (for example, masking or hand-washing), indoor RH optimization would achieve high compliance because all occupants of a common indoor space would be exposed to similar ambient conditions,” the study said. “Compared to the long timelines and high costs of vaccine production and distribution, humidity control systems could potentially be implemented more quickly and cheaply in certain indoor settings.”

A version of this article first appeared on WebMD.com.

A less-than-1% decrease in weekly COVID-19 cases in children demonstrated continued stability in the pandemic situation as the nation heads into the holiday season.

“Over the past 6 weeks, weekly reported child cases have plateaued at an average of about 27,000 cases,” the American Academy of Pediatrics and the Children’s Hospital Association said in the latest edition of their joint COVID report.

New cases for the week of Nov. 11-17 totaled 27,899, down by 0.9% from the previous week and just 4 weeks removed from the lowest total of the year: 22,719 for Oct. 14-20. There have been just under 15 million cases of COVID-19 in children since the pandemic began, and children represent 18.3% of cases in all ages, the AAP and CHA reported.

Conditions look favorable for that plateau to continue, despite the upcoming holidays, White House COVID-19 coordinator Ashish Jha said recently. “We are in a very different place and we will remain in a different place,” Dr. Jha said, according to STAT News. “We are now at a point where I believe if you’re up to date on your vaccines, you have access to treatments ... there really should be no restrictions on people’s activities.”

One possible spoiler, an apparent spike in COVID-related hospitalizations in children we reported last week, seems to have been a false alarm. The rate of new admissions for Nov. 11, which preliminary data suggested was 0.48 per 100,000 population, has now been revised with more solid data to 0.20 per 100,000, according to the Centers for Disease Control and Prevention.

“We continue to monitor the recent increases in admissions among children. Some of these may be admissions with COVID-19, not because of COVID-19. Co-infections are being noted in our surveillance systems for hospitalizations among children; as much as 10% of admissions or higher have viruses codetected (RSV, influenza, enterovirus/rhinovirus, and other respiratory viruses),” a CDC spokesperson told this news organization.

For children aged 0-17 years, the current 7-day (Nov. 13-19) average number of new admissions with confirmed COVID is 129 per day, down from 147 for the previous 7-day average. Emergency department visits with diagnosed COVID, measured as a percentage of all ED visits, are largely holding steady. The latest 7-day averages available (Nov. 18) – 1.0% for children aged 0-11 years, 0.7% for 12- to 15-year-olds, and 0.8% in 16- to 17-year-olds – are the same or within a tenth of a percent of the rates recorded on Oct. 18, CDC data show.

New vaccinations for the week of Nov. 10-16 were down just slightly for children under age 5 years and for those aged 5-11 years, with a larger drop seen among 12- to 17-year-olds, the AAP said in its weekly vaccination report. So far, 7.9% of all children under age 5 have received at least one dose of COVID vaccine, as have 39.1% of 5 to 11-year-olds and 71.5% of those aged 12-17years, the CDC said on its COVID Data Tracker.
 

A less-than-1% decrease in weekly COVID-19 cases in children demonstrated continued stability in the pandemic situation as the nation heads into the holiday season.

“Over the past 6 weeks, weekly reported child cases have plateaued at an average of about 27,000 cases,” the American Academy of Pediatrics and the Children’s Hospital Association said in the latest edition of their joint COVID report.

New cases for the week of Nov. 11-17 totaled 27,899, down by 0.9% from the previous week and just 4 weeks removed from the lowest total of the year: 22,719 for Oct. 14-20. There have been just under 15 million cases of COVID-19 in children since the pandemic began, and children represent 18.3% of cases in all ages, the AAP and CHA reported.

Conditions look favorable for that plateau to continue, despite the upcoming holidays, White House COVID-19 coordinator Ashish Jha said recently. “We are in a very different place and we will remain in a different place,” Dr. Jha said, according to STAT News. “We are now at a point where I believe if you’re up to date on your vaccines, you have access to treatments ... there really should be no restrictions on people’s activities.”

One possible spoiler, an apparent spike in COVID-related hospitalizations in children we reported last week, seems to have been a false alarm. The rate of new admissions for Nov. 11, which preliminary data suggested was 0.48 per 100,000 population, has now been revised with more solid data to 0.20 per 100,000, according to the Centers for Disease Control and Prevention.

“We continue to monitor the recent increases in admissions among children. Some of these may be admissions with COVID-19, not because of COVID-19. Co-infections are being noted in our surveillance systems for hospitalizations among children; as much as 10% of admissions or higher have viruses codetected (RSV, influenza, enterovirus/rhinovirus, and other respiratory viruses),” a CDC spokesperson told this news organization.

For children aged 0-17 years, the current 7-day (Nov. 13-19) average number of new admissions with confirmed COVID is 129 per day, down from 147 for the previous 7-day average. Emergency department visits with diagnosed COVID, measured as a percentage of all ED visits, are largely holding steady. The latest 7-day averages available (Nov. 18) – 1.0% for children aged 0-11 years, 0.7% for 12- to 15-year-olds, and 0.8% in 16- to 17-year-olds – are the same or within a tenth of a percent of the rates recorded on Oct. 18, CDC data show.

New vaccinations for the week of Nov. 10-16 were down just slightly for children under age 5 years and for those aged 5-11 years, with a larger drop seen among 12- to 17-year-olds, the AAP said in its weekly vaccination report. So far, 7.9% of all children under age 5 have received at least one dose of COVID vaccine, as have 39.1% of 5 to 11-year-olds and 71.5% of those aged 12-17years, the CDC said on its COVID Data Tracker.
 

A less-than-1% decrease in weekly COVID-19 cases in children demonstrated continued stability in the pandemic situation as the nation heads into the holiday season.

“Over the past 6 weeks, weekly reported child cases have plateaued at an average of about 27,000 cases,” the American Academy of Pediatrics and the Children’s Hospital Association said in the latest edition of their joint COVID report.

New cases for the week of Nov. 11-17 totaled 27,899, down by 0.9% from the previous week and just 4 weeks removed from the lowest total of the year: 22,719 for Oct. 14-20. There have been just under 15 million cases of COVID-19 in children since the pandemic began, and children represent 18.3% of cases in all ages, the AAP and CHA reported.

Conditions look favorable for that plateau to continue, despite the upcoming holidays, White House COVID-19 coordinator Ashish Jha said recently. “We are in a very different place and we will remain in a different place,” Dr. Jha said, according to STAT News. “We are now at a point where I believe if you’re up to date on your vaccines, you have access to treatments ... there really should be no restrictions on people’s activities.”

One possible spoiler, an apparent spike in COVID-related hospitalizations in children we reported last week, seems to have been a false alarm. The rate of new admissions for Nov. 11, which preliminary data suggested was 0.48 per 100,000 population, has now been revised with more solid data to 0.20 per 100,000, according to the Centers for Disease Control and Prevention.

“We continue to monitor the recent increases in admissions among children. Some of these may be admissions with COVID-19, not because of COVID-19. Co-infections are being noted in our surveillance systems for hospitalizations among children; as much as 10% of admissions or higher have viruses codetected (RSV, influenza, enterovirus/rhinovirus, and other respiratory viruses),” a CDC spokesperson told this news organization.

For children aged 0-17 years, the current 7-day (Nov. 13-19) average number of new admissions with confirmed COVID is 129 per day, down from 147 for the previous 7-day average. Emergency department visits with diagnosed COVID, measured as a percentage of all ED visits, are largely holding steady. The latest 7-day averages available (Nov. 18) – 1.0% for children aged 0-11 years, 0.7% for 12- to 15-year-olds, and 0.8% in 16- to 17-year-olds – are the same or within a tenth of a percent of the rates recorded on Oct. 18, CDC data show.

New vaccinations for the week of Nov. 10-16 were down just slightly for children under age 5 years and for those aged 5-11 years, with a larger drop seen among 12- to 17-year-olds, the AAP said in its weekly vaccination report. So far, 7.9% of all children under age 5 have received at least one dose of COVID vaccine, as have 39.1% of 5 to 11-year-olds and 71.5% of those aged 12-17years, the CDC said on its COVID Data Tracker.
 

After recovery from acute infection with SARS-CoV-2, major stressful life events such as the death of a loved one or financial insecurity can have a significant impact on the development of long COVID symptoms, new research suggests.

Major life stressors in the year after hospital discharge for COVID-19 are “strongly predictive of a lot of the important outcomes that people may face after COVID,” lead investigator Jennifer A. Frontera, MD, a professor in the department of neurology at New York University Langone Health, said in an interview.

These outcomes include depression, brain fog, fatigue, trouble sleeping, and other long COVID symptoms.

The findings were published online in the Journal of the Neurological Sciences.
 

Major stressful events common

Dr. Frontera and the NYU Neurology COVID-19 study team evaluated 451 adults who survived a COVID hospital stay. Of these, 383 completed a 6-month follow-up, 242 completed a 12-month follow-up, and 174 completed follow-up at both time points. 

Within 1 year of discharge, 77 (17%) patients died and 51% suffered a major stressful life event.

In multivariable analyses, major life stressors – including financial insecurity, food insecurity, death of a close contact, and new disability – were strong independent predictors of disability, trouble with activities of daily living, depression, fatigue, sleep problems, and prolonged post-acute COVID symptoms. The adjusted odds ratios for these outcomes ranged from 2.5 to 20.8. 

The research also confirmed the contribution of traditional risk factors for long COVID symptoms, as shown in past studies. These include older age, poor pre-COVID functional status, and more severe initial COVID-19 infection.

Long-term sequelae of COVID are increasingly recognized as major public health issues. 

It has been estimated that roughly 16 million U.S. adults aged 18-65 years ave long COVID, with the often debilitating symptoms keeping up to 4 million out of work. 
 

Holistic approach

Dr. Frontera said it’s important to realize that “sleep, fatigue, anxiety, depression, even cognition are so interwoven with each other that anything that impacts any one of them could have repercussions on the other.”

She added that it “certainly makes sense that there is an interplay or even a bidirectional relationship between the stressors that people face and how well they can recover after COVID.”

Therapies that lessen the trauma of the most stress-inducing life events need to be a central part of treatment for long COVID, with more research needed to validate the best approaches, Dr. Frontera said.

She also noted that social services or case management resources may be able to help address at least some of the stressors that individuals are under – and it is important to refer them to these resources. Referral to mental health services is also important.

“I think it’s really important to take a holistic approach and try to deal with whatever the problem may be,” said Dr. Frontera.

“I’m a neurologist, but as part of my evaluation, I really need to address if there are life stressors or mental health issues that may be impacting this person’s function,” she added.

The study had no commercial funding. The investigators reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

After recovery from acute infection with SARS-CoV-2, major stressful life events such as the death of a loved one or financial insecurity can have a significant impact on the development of long COVID symptoms, new research suggests.

Major life stressors in the year after hospital discharge for COVID-19 are “strongly predictive of a lot of the important outcomes that people may face after COVID,” lead investigator Jennifer A. Frontera, MD, a professor in the department of neurology at New York University Langone Health, said in an interview.

These outcomes include depression, brain fog, fatigue, trouble sleeping, and other long COVID symptoms.

The findings were published online in the Journal of the Neurological Sciences.
 

Major stressful events common

Dr. Frontera and the NYU Neurology COVID-19 study team evaluated 451 adults who survived a COVID hospital stay. Of these, 383 completed a 6-month follow-up, 242 completed a 12-month follow-up, and 174 completed follow-up at both time points. 

Within 1 year of discharge, 77 (17%) patients died and 51% suffered a major stressful life event.

In multivariable analyses, major life stressors – including financial insecurity, food insecurity, death of a close contact, and new disability – were strong independent predictors of disability, trouble with activities of daily living, depression, fatigue, sleep problems, and prolonged post-acute COVID symptoms. The adjusted odds ratios for these outcomes ranged from 2.5 to 20.8. 

The research also confirmed the contribution of traditional risk factors for long COVID symptoms, as shown in past studies. These include older age, poor pre-COVID functional status, and more severe initial COVID-19 infection.

Long-term sequelae of COVID are increasingly recognized as major public health issues. 

It has been estimated that roughly 16 million U.S. adults aged 18-65 years ave long COVID, with the often debilitating symptoms keeping up to 4 million out of work. 
 

Holistic approach

Dr. Frontera said it’s important to realize that “sleep, fatigue, anxiety, depression, even cognition are so interwoven with each other that anything that impacts any one of them could have repercussions on the other.”

She added that it “certainly makes sense that there is an interplay or even a bidirectional relationship between the stressors that people face and how well they can recover after COVID.”

Therapies that lessen the trauma of the most stress-inducing life events need to be a central part of treatment for long COVID, with more research needed to validate the best approaches, Dr. Frontera said.

She also noted that social services or case management resources may be able to help address at least some of the stressors that individuals are under – and it is important to refer them to these resources. Referral to mental health services is also important.

“I think it’s really important to take a holistic approach and try to deal with whatever the problem may be,” said Dr. Frontera.

“I’m a neurologist, but as part of my evaluation, I really need to address if there are life stressors or mental health issues that may be impacting this person’s function,” she added.

The study had no commercial funding. The investigators reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

After recovery from acute infection with SARS-CoV-2, major stressful life events such as the death of a loved one or financial insecurity can have a significant impact on the development of long COVID symptoms, new research suggests.

Major life stressors in the year after hospital discharge for COVID-19 are “strongly predictive of a lot of the important outcomes that people may face after COVID,” lead investigator Jennifer A. Frontera, MD, a professor in the department of neurology at New York University Langone Health, said in an interview.

These outcomes include depression, brain fog, fatigue, trouble sleeping, and other long COVID symptoms.

The findings were published online in the Journal of the Neurological Sciences.
 

Major stressful events common

Dr. Frontera and the NYU Neurology COVID-19 study team evaluated 451 adults who survived a COVID hospital stay. Of these, 383 completed a 6-month follow-up, 242 completed a 12-month follow-up, and 174 completed follow-up at both time points. 

Within 1 year of discharge, 77 (17%) patients died and 51% suffered a major stressful life event.

In multivariable analyses, major life stressors – including financial insecurity, food insecurity, death of a close contact, and new disability – were strong independent predictors of disability, trouble with activities of daily living, depression, fatigue, sleep problems, and prolonged post-acute COVID symptoms. The adjusted odds ratios for these outcomes ranged from 2.5 to 20.8. 

The research also confirmed the contribution of traditional risk factors for long COVID symptoms, as shown in past studies. These include older age, poor pre-COVID functional status, and more severe initial COVID-19 infection.

Long-term sequelae of COVID are increasingly recognized as major public health issues. 

It has been estimated that roughly 16 million U.S. adults aged 18-65 years ave long COVID, with the often debilitating symptoms keeping up to 4 million out of work. 
 

Holistic approach

Dr. Frontera said it’s important to realize that “sleep, fatigue, anxiety, depression, even cognition are so interwoven with each other that anything that impacts any one of them could have repercussions on the other.”

She added that it “certainly makes sense that there is an interplay or even a bidirectional relationship between the stressors that people face and how well they can recover after COVID.”

Therapies that lessen the trauma of the most stress-inducing life events need to be a central part of treatment for long COVID, with more research needed to validate the best approaches, Dr. Frontera said.

She also noted that social services or case management resources may be able to help address at least some of the stressors that individuals are under – and it is important to refer them to these resources. Referral to mental health services is also important.

“I think it’s really important to take a holistic approach and try to deal with whatever the problem may be,” said Dr. Frontera.

“I’m a neurologist, but as part of my evaluation, I really need to address if there are life stressors or mental health issues that may be impacting this person’s function,” she added.

The study had no commercial funding. The investigators reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Headlines over the past few weeks are ringing the alarm about earlier and more serious influenza (flu) and respiratory syncytial virus (RSV) outbreaks compared with previous years. Add COVID-19 to the mix and you have a dangerous mash of viruses that have many experts calling for caution and searching for explanations.

RSV and the flu “are certainly getting more attention, and they’re getting more attention for two reasons,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University, Nashville, Tenn.

“The first is that they’re both extraordinarily early. The second is that they’re both out there spreading very, very rapidly,” he told this news organization.

RSV usually follows a seasonal pattern with cases peaking in January and February. Both viruses tend to hit different regions of the country at different times, and that’s not the case in 2022.

“This is particularly striking for RSV, which usually doesn’t affect the entire country simultaneously,” Dr. Schaffner said.

“Yes, RSV is causing many more hospitalizations and earlier than any previously recorded season in the U.S.,” according to figures from the Centers for Disease Control and Prevention on RSV hospitalizations, said Kevin Messacar, MD, PhD, associate professor at the University of Colorado at Denver, Aurora, and a pediatric infectious disease specialist at Children’s Hospital Colorado in Aurora.

Although there could be some increase in diagnoses because of increased awareness, the jump in RSV and flu cases “is a real phenomenon for multiple reasons,” said Peter Chin-Hong, MD, professor in the division of infectious diseases at the University of California, San Francisco.

With fewer COVID-related restrictions, people are moving around more. Also, during fall and winter, people tend to gather indoors. Colder temperatures and lower humidity contribute as well, Dr. Chin-Hong said, because “the droplets are just simply lighter.

“I think those are all factors,” he told this news organization.

Paul Auwaerter, MD, agreed that there are likely multiple causes for the unusual timing and severity of RSV and flu this year.

“Change in behaviors is a leading cause,” said the clinical director for the division of infectious diseases at the Johns Hopkins University, Baltimore. More people returning to the workplace and children going to school without masks are examples, he added.

Less exposure to these three viruses also means there was less immune boosting among existing populations, he said. This can lead to “larger susceptible populations, especially infants and younger children, due to the relative absence of circulating virus in past years.”
 

A leading theory

Are we paying a price now for people following the edicts from officials to mask up, stand apart, and take other personal and public health precautions during the COVID-19 pandemic?

It’s possible, but that may not be the whole story.

“When it comes to RSV, I think that theory of isolation, social distancing, mask wearing, and not attending schools is a very valid one,” Dr. Schaffner said. “That’s everybody’s favorite [reason].”

He said he is confident that the jump in RSV cases is being driven by previous COVID public health protections. However, he’s “a little more cautious about influenza, in part because influenza is so variable.

“Like people in influenza say, if you’ve seen one influenza season, you’ve seen one influenza season,” Dr. Schaffner said.

“There’s a lot of debate,” he added. “Nobody can say definitively whether the immune deficit or debt is a consequence of not being stimulated and restimulated by the influenza virus over the past two seasons.”
 

‘A perfect storm’

“Now you kind of have the perfect storm,” Dr. Chin-Hong said. “It’s not a good situation for COVID with the variants that are emerging. For influenza, not having seen a lot of influenza the last 2 years, we’re probably more susceptible to getting infected.”

RSV cases rose during summer 2021, but now the weather is colder, and people are interacting more closely. “And it’s very, very transmissible,” he said.

Dr. Chin-Hong also predicted that “even though we don’t have a lot of COVID now, COVID will probably pick up.”

The rise in RSV was unexpected by some experts. “This early influenza is also a bit of a surprise and may be influenced by the fact that lots of us are going back and seeing each other again close-to-close, face-to-face in many enclosed environments,” Dr. Schaffner said.

He estimated the 2022-2023 flu season started 4-6 weeks early “and it’s taken off like a rocket. It started in the Southeast, quickly went to the Southwest and up the East Coast. Now it’s moving dramatically through the Midwest and will continue. It’s quite sure to hit the West Coast if it isn’t there already.”
 

A phenomenon by any other name

Some are calling the situation an “immunity debt,” while others dub it an “immunity pause” or an “immunity deficit.” Many physicians and immunologists have taken to social media to push back on the term “immunity debt,” saying it’s a mischaracterization that is being used to vilify COVID precautions, such as masking, social distancing, and other protective measures taken during the pandemic.

“I prefer the term ‘immunity gap’ ... which is more established in the epidemiology literature, especially given the politicization of the term ‘immunity debt’ by folks recently,” Dr. Messacar said.

“To me, the immunity gap is a scientific observation, not a political argument,” he added.

In a July 2022 publication in The Lancet, Dr. Messacar and his colleagues stated that “decreased exposure to endemic viruses created an immunity gap – a group of susceptible individuals who avoided infection and therefore lack pathogen-specific immunity to protect against future infection. Decreases in childhood vaccinations with pandemic disruptions to health care delivery contribute to this immunity gap for vaccine-preventable diseases, such as influenza,measles, and polio.”

The researchers noted that because of isolation during the pandemic, older children and newborns are being exposed to RSV for the first time. Returning to birthday parties, playing with friends, and going to school without masks means “children are being exposed to RSV, and that’s likely the reason that RSV is moving early and very, very substantially through this now expanded pool of susceptible children,” Dr. Schaffner said.
 

How likely are coinfections?

With peaks in RSV, flu, and COVID-19 cases each predicted in the coming months, how likely is it that someone could get sick with more than one infection at the same time?

Early in the pandemic, coinfection with COVID and the flu was reported in people at some centers on the West Coast, Dr. Auwaerter said. Now, however, “the unpredictable nature of the Omicron subvariants and the potential for further change, along with the never-before-seen significant lessening of influenza over 2 years, leave little for predictability.

“I do think it is less likely, given the extent of immunity now to SARS-CoV-2 in the population,” Dr. Auwaerter said.

“I most worry about viral coinfections ... in people with suppressed immune systems if we have high community rates of the SARS-CoV-2 and influenza circulating this fall and winter,” he added.

Studies during the pandemic suggest that coinfection with the SARS-CoV-2 virus and another respiratory virus were either rare or nonexistent.

Dr. Schaffner said these findings align with his experience at Vanderbilt University, which is part of a CDC-sponsored network that tracks laboratory-confirmed RSV, flu, and COVID cases among people in the hospital. “Coinfections are, at least to date, very unusual.”

There needs to be an asterisk next to that, Dr. Schaffner added. “Looking back over the last 2 years, we’ve had very little influenza, and we’ve had curtailed RSV seasons. So there hasn’t been a whole lot of opportunity for dual infections to occur.

“So this year may be more revelatory as we go forward,” he said.
 

Future concerns

The future is uncertain, Dr. Messacar and colleagues wrote in The Lancet: “Crucially, the patterns of these returning viral outbreaks have been heterogeneous across locations, populations, and pathogens, making predictions and preparations challenging.”

Dr. Chin-Hong used a horse race analogy to illustrate the situation now and going forward. RSV is the front-running horse, and influenza is running behind but trying to catch up. “And then COVID is the dark horse. It’s trailing the race right now – but all these variants are giving the horse extra supplements.

“And the COVID horse is probably going to be very competitive with the front-runner,” he said.

“We’re just at the beginning of the race right now,” Dr. Chin-Hong said, “so that’s why we’re worried that these three [viruses] will be even more pronounced come later in the year.”

A version of this article first appeared on Medscape.com.

Headlines over the past few weeks are ringing the alarm about earlier and more serious influenza (flu) and respiratory syncytial virus (RSV) outbreaks compared with previous years. Add COVID-19 to the mix and you have a dangerous mash of viruses that have many experts calling for caution and searching for explanations.

RSV and the flu “are certainly getting more attention, and they’re getting more attention for two reasons,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University, Nashville, Tenn.

“The first is that they’re both extraordinarily early. The second is that they’re both out there spreading very, very rapidly,” he told this news organization.

RSV usually follows a seasonal pattern with cases peaking in January and February. Both viruses tend to hit different regions of the country at different times, and that’s not the case in 2022.

“This is particularly striking for RSV, which usually doesn’t affect the entire country simultaneously,” Dr. Schaffner said.

“Yes, RSV is causing many more hospitalizations and earlier than any previously recorded season in the U.S.,” according to figures from the Centers for Disease Control and Prevention on RSV hospitalizations, said Kevin Messacar, MD, PhD, associate professor at the University of Colorado at Denver, Aurora, and a pediatric infectious disease specialist at Children’s Hospital Colorado in Aurora.

Although there could be some increase in diagnoses because of increased awareness, the jump in RSV and flu cases “is a real phenomenon for multiple reasons,” said Peter Chin-Hong, MD, professor in the division of infectious diseases at the University of California, San Francisco.

With fewer COVID-related restrictions, people are moving around more. Also, during fall and winter, people tend to gather indoors. Colder temperatures and lower humidity contribute as well, Dr. Chin-Hong said, because “the droplets are just simply lighter.

“I think those are all factors,” he told this news organization.

Paul Auwaerter, MD, agreed that there are likely multiple causes for the unusual timing and severity of RSV and flu this year.

“Change in behaviors is a leading cause,” said the clinical director for the division of infectious diseases at the Johns Hopkins University, Baltimore. More people returning to the workplace and children going to school without masks are examples, he added.

Less exposure to these three viruses also means there was less immune boosting among existing populations, he said. This can lead to “larger susceptible populations, especially infants and younger children, due to the relative absence of circulating virus in past years.”
 

A leading theory

Are we paying a price now for people following the edicts from officials to mask up, stand apart, and take other personal and public health precautions during the COVID-19 pandemic?

It’s possible, but that may not be the whole story.

“When it comes to RSV, I think that theory of isolation, social distancing, mask wearing, and not attending schools is a very valid one,” Dr. Schaffner said. “That’s everybody’s favorite [reason].”

He said he is confident that the jump in RSV cases is being driven by previous COVID public health protections. However, he’s “a little more cautious about influenza, in part because influenza is so variable.

“Like people in influenza say, if you’ve seen one influenza season, you’ve seen one influenza season,” Dr. Schaffner said.

“There’s a lot of debate,” he added. “Nobody can say definitively whether the immune deficit or debt is a consequence of not being stimulated and restimulated by the influenza virus over the past two seasons.”
 

‘A perfect storm’

“Now you kind of have the perfect storm,” Dr. Chin-Hong said. “It’s not a good situation for COVID with the variants that are emerging. For influenza, not having seen a lot of influenza the last 2 years, we’re probably more susceptible to getting infected.”

RSV cases rose during summer 2021, but now the weather is colder, and people are interacting more closely. “And it’s very, very transmissible,” he said.

Dr. Chin-Hong also predicted that “even though we don’t have a lot of COVID now, COVID will probably pick up.”

The rise in RSV was unexpected by some experts. “This early influenza is also a bit of a surprise and may be influenced by the fact that lots of us are going back and seeing each other again close-to-close, face-to-face in many enclosed environments,” Dr. Schaffner said.

He estimated the 2022-2023 flu season started 4-6 weeks early “and it’s taken off like a rocket. It started in the Southeast, quickly went to the Southwest and up the East Coast. Now it’s moving dramatically through the Midwest and will continue. It’s quite sure to hit the West Coast if it isn’t there already.”
 

A phenomenon by any other name

Some are calling the situation an “immunity debt,” while others dub it an “immunity pause” or an “immunity deficit.” Many physicians and immunologists have taken to social media to push back on the term “immunity debt,” saying it’s a mischaracterization that is being used to vilify COVID precautions, such as masking, social distancing, and other protective measures taken during the pandemic.

“I prefer the term ‘immunity gap’ ... which is more established in the epidemiology literature, especially given the politicization of the term ‘immunity debt’ by folks recently,” Dr. Messacar said.

“To me, the immunity gap is a scientific observation, not a political argument,” he added.

In a July 2022 publication in The Lancet, Dr. Messacar and his colleagues stated that “decreased exposure to endemic viruses created an immunity gap – a group of susceptible individuals who avoided infection and therefore lack pathogen-specific immunity to protect against future infection. Decreases in childhood vaccinations with pandemic disruptions to health care delivery contribute to this immunity gap for vaccine-preventable diseases, such as influenza,measles, and polio.”

The researchers noted that because of isolation during the pandemic, older children and newborns are being exposed to RSV for the first time. Returning to birthday parties, playing with friends, and going to school without masks means “children are being exposed to RSV, and that’s likely the reason that RSV is moving early and very, very substantially through this now expanded pool of susceptible children,” Dr. Schaffner said.
 

How likely are coinfections?

With peaks in RSV, flu, and COVID-19 cases each predicted in the coming months, how likely is it that someone could get sick with more than one infection at the same time?

Early in the pandemic, coinfection with COVID and the flu was reported in people at some centers on the West Coast, Dr. Auwaerter said. Now, however, “the unpredictable nature of the Omicron subvariants and the potential for further change, along with the never-before-seen significant lessening of influenza over 2 years, leave little for predictability.

“I do think it is less likely, given the extent of immunity now to SARS-CoV-2 in the population,” Dr. Auwaerter said.

“I most worry about viral coinfections ... in people with suppressed immune systems if we have high community rates of the SARS-CoV-2 and influenza circulating this fall and winter,” he added.

Studies during the pandemic suggest that coinfection with the SARS-CoV-2 virus and another respiratory virus were either rare or nonexistent.

Dr. Schaffner said these findings align with his experience at Vanderbilt University, which is part of a CDC-sponsored network that tracks laboratory-confirmed RSV, flu, and COVID cases among people in the hospital. “Coinfections are, at least to date, very unusual.”

There needs to be an asterisk next to that, Dr. Schaffner added. “Looking back over the last 2 years, we’ve had very little influenza, and we’ve had curtailed RSV seasons. So there hasn’t been a whole lot of opportunity for dual infections to occur.

“So this year may be more revelatory as we go forward,” he said.
 

Future concerns

The future is uncertain, Dr. Messacar and colleagues wrote in The Lancet: “Crucially, the patterns of these returning viral outbreaks have been heterogeneous across locations, populations, and pathogens, making predictions and preparations challenging.”

Dr. Chin-Hong used a horse race analogy to illustrate the situation now and going forward. RSV is the front-running horse, and influenza is running behind but trying to catch up. “And then COVID is the dark horse. It’s trailing the race right now – but all these variants are giving the horse extra supplements.

“And the COVID horse is probably going to be very competitive with the front-runner,” he said.

“We’re just at the beginning of the race right now,” Dr. Chin-Hong said, “so that’s why we’re worried that these three [viruses] will be even more pronounced come later in the year.”

A version of this article first appeared on Medscape.com.

Headlines over the past few weeks are ringing the alarm about earlier and more serious influenza (flu) and respiratory syncytial virus (RSV) outbreaks compared with previous years. Add COVID-19 to the mix and you have a dangerous mash of viruses that have many experts calling for caution and searching for explanations.

RSV and the flu “are certainly getting more attention, and they’re getting more attention for two reasons,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University, Nashville, Tenn.

“The first is that they’re both extraordinarily early. The second is that they’re both out there spreading very, very rapidly,” he told this news organization.

RSV usually follows a seasonal pattern with cases peaking in January and February. Both viruses tend to hit different regions of the country at different times, and that’s not the case in 2022.

“This is particularly striking for RSV, which usually doesn’t affect the entire country simultaneously,” Dr. Schaffner said.

“Yes, RSV is causing many more hospitalizations and earlier than any previously recorded season in the U.S.,” according to figures from the Centers for Disease Control and Prevention on RSV hospitalizations, said Kevin Messacar, MD, PhD, associate professor at the University of Colorado at Denver, Aurora, and a pediatric infectious disease specialist at Children’s Hospital Colorado in Aurora.

Although there could be some increase in diagnoses because of increased awareness, the jump in RSV and flu cases “is a real phenomenon for multiple reasons,” said Peter Chin-Hong, MD, professor in the division of infectious diseases at the University of California, San Francisco.

With fewer COVID-related restrictions, people are moving around more. Also, during fall and winter, people tend to gather indoors. Colder temperatures and lower humidity contribute as well, Dr. Chin-Hong said, because “the droplets are just simply lighter.

“I think those are all factors,” he told this news organization.

Paul Auwaerter, MD, agreed that there are likely multiple causes for the unusual timing and severity of RSV and flu this year.

“Change in behaviors is a leading cause,” said the clinical director for the division of infectious diseases at the Johns Hopkins University, Baltimore. More people returning to the workplace and children going to school without masks are examples, he added.

Less exposure to these three viruses also means there was less immune boosting among existing populations, he said. This can lead to “larger susceptible populations, especially infants and younger children, due to the relative absence of circulating virus in past years.”
 

A leading theory

Are we paying a price now for people following the edicts from officials to mask up, stand apart, and take other personal and public health precautions during the COVID-19 pandemic?

It’s possible, but that may not be the whole story.

“When it comes to RSV, I think that theory of isolation, social distancing, mask wearing, and not attending schools is a very valid one,” Dr. Schaffner said. “That’s everybody’s favorite [reason].”

He said he is confident that the jump in RSV cases is being driven by previous COVID public health protections. However, he’s “a little more cautious about influenza, in part because influenza is so variable.

“Like people in influenza say, if you’ve seen one influenza season, you’ve seen one influenza season,” Dr. Schaffner said.

“There’s a lot of debate,” he added. “Nobody can say definitively whether the immune deficit or debt is a consequence of not being stimulated and restimulated by the influenza virus over the past two seasons.”
 

‘A perfect storm’

“Now you kind of have the perfect storm,” Dr. Chin-Hong said. “It’s not a good situation for COVID with the variants that are emerging. For influenza, not having seen a lot of influenza the last 2 years, we’re probably more susceptible to getting infected.”

RSV cases rose during summer 2021, but now the weather is colder, and people are interacting more closely. “And it’s very, very transmissible,” he said.

Dr. Chin-Hong also predicted that “even though we don’t have a lot of COVID now, COVID will probably pick up.”

The rise in RSV was unexpected by some experts. “This early influenza is also a bit of a surprise and may be influenced by the fact that lots of us are going back and seeing each other again close-to-close, face-to-face in many enclosed environments,” Dr. Schaffner said.

He estimated the 2022-2023 flu season started 4-6 weeks early “and it’s taken off like a rocket. It started in the Southeast, quickly went to the Southwest and up the East Coast. Now it’s moving dramatically through the Midwest and will continue. It’s quite sure to hit the West Coast if it isn’t there already.”
 

A phenomenon by any other name

Some are calling the situation an “immunity debt,” while others dub it an “immunity pause” or an “immunity deficit.” Many physicians and immunologists have taken to social media to push back on the term “immunity debt,” saying it’s a mischaracterization that is being used to vilify COVID precautions, such as masking, social distancing, and other protective measures taken during the pandemic.

“I prefer the term ‘immunity gap’ ... which is more established in the epidemiology literature, especially given the politicization of the term ‘immunity debt’ by folks recently,” Dr. Messacar said.

“To me, the immunity gap is a scientific observation, not a political argument,” he added.

In a July 2022 publication in The Lancet, Dr. Messacar and his colleagues stated that “decreased exposure to endemic viruses created an immunity gap – a group of susceptible individuals who avoided infection and therefore lack pathogen-specific immunity to protect against future infection. Decreases in childhood vaccinations with pandemic disruptions to health care delivery contribute to this immunity gap for vaccine-preventable diseases, such as influenza,measles, and polio.”

The researchers noted that because of isolation during the pandemic, older children and newborns are being exposed to RSV for the first time. Returning to birthday parties, playing with friends, and going to school without masks means “children are being exposed to RSV, and that’s likely the reason that RSV is moving early and very, very substantially through this now expanded pool of susceptible children,” Dr. Schaffner said.
 

How likely are coinfections?

With peaks in RSV, flu, and COVID-19 cases each predicted in the coming months, how likely is it that someone could get sick with more than one infection at the same time?

Early in the pandemic, coinfection with COVID and the flu was reported in people at some centers on the West Coast, Dr. Auwaerter said. Now, however, “the unpredictable nature of the Omicron subvariants and the potential for further change, along with the never-before-seen significant lessening of influenza over 2 years, leave little for predictability.

“I do think it is less likely, given the extent of immunity now to SARS-CoV-2 in the population,” Dr. Auwaerter said.

“I most worry about viral coinfections ... in people with suppressed immune systems if we have high community rates of the SARS-CoV-2 and influenza circulating this fall and winter,” he added.

Studies during the pandemic suggest that coinfection with the SARS-CoV-2 virus and another respiratory virus were either rare or nonexistent.

Dr. Schaffner said these findings align with his experience at Vanderbilt University, which is part of a CDC-sponsored network that tracks laboratory-confirmed RSV, flu, and COVID cases among people in the hospital. “Coinfections are, at least to date, very unusual.”

There needs to be an asterisk next to that, Dr. Schaffner added. “Looking back over the last 2 years, we’ve had very little influenza, and we’ve had curtailed RSV seasons. So there hasn’t been a whole lot of opportunity for dual infections to occur.

“So this year may be more revelatory as we go forward,” he said.
 

Future concerns

The future is uncertain, Dr. Messacar and colleagues wrote in The Lancet: “Crucially, the patterns of these returning viral outbreaks have been heterogeneous across locations, populations, and pathogens, making predictions and preparations challenging.”

Dr. Chin-Hong used a horse race analogy to illustrate the situation now and going forward. RSV is the front-running horse, and influenza is running behind but trying to catch up. “And then COVID is the dark horse. It’s trailing the race right now – but all these variants are giving the horse extra supplements.

“And the COVID horse is probably going to be very competitive with the front-runner,” he said.

“We’re just at the beginning of the race right now,” Dr. Chin-Hong said, “so that’s why we’re worried that these three [viruses] will be even more pronounced come later in the year.”

A version of this article first appeared on Medscape.com.

U.K. researchers have established that hypertension is associated with a 22% greater risk of severe COVID-19, with the odds of severe COVID-19 unaffected by medication type.

Hypertension “appears to be one of the commonest comorbidities in COVID-19 patients”, explained the authors of a new study, published in PLOS ONE. The authors highlighted that previous research had shown that hypertension was more prevalent in severe and fatal cases compared with all cases of COVID-19.

They pointed out, however, that whether hypertensive individuals have a higher risk of severe COVID-19, compared with nonhypertensives, and whether the absolute level of systolic blood pressure or the type of antihypertensive medication is related to this risk, remained “unclear.”

To try to answer these questions, the research team, led by University of Cambridge researchers, analyzed data from 16,134 individuals who tested positive for COVID-19 (mean age 65.3 years, 47% male, 90% white), 40% were diagnosed with essential hypertension at the analysis baseline – 22% of whom had developed severe COVID-19.

Systolic blood pressure (SBP) was categorized by 10–mm Hg ranges, starting from < 120 mm Hg up to 180+ mm Hg, with the reference category defined as 120-129 mm Hg, based on data from the SPRINT study, which demonstrated that intensive SBP lowering to below 120 mm Hg, as compared with the traditional threshold of 140 mm Hg, was beneficial. Diastolic blood pressure was categorized by 10–mm Hg ranges, starting from < 60 mm Hg up to 100+ mm Hg with 80-90 mm Hg being the reference category.

In their analyses the researchers adjusted for age, sex, body mass index, ethnicity, smoking status, diabetes status, socioeconomic status, and inflammation (C-reactive protein [CRP]), as these were proposed as potential confounders. To assess the direct effect of hypertension on COVID-19, they also adjusted for intermediate variables, including cardiovascular comorbidities and stroke, on the causal pathway between hypertension and severe COVID-19.
 

Majority of effect of hypertension on severe COVID-19 was direct

The unadjusted odds ratio of the association between hypertension and severe COVID-19 was 2.33 (95% confidence interval, 2.16-2.51), the authors emphasized. They found that, after adjusting for all confounding variables, hypertension was associated with 22% higher odds of severe COVID-19 (OR, 1.22; 95% CI, 1.12-1.33), compared with normotension.

Individuals with severe COVID-19 were marginally older, more likely to be male, and more deprived, the authors said. “They were also more likely to be hypertensive, compared with individuals without severe COVID-19, and a greater proportion of individuals with severe COVID-19 had cardiovascular comorbidities.”

The majority of the effect of hypertension on development of severe COVID-19 was “direct,” they said. However, a modest proportion of the effect was mediated via cardiovascular comorbidities such as peripheral vascular disease, MI, coronary heart disease, arrhythmias, and stroke. Of note, those with a history of stroke had a 47% higher risk of severe COVID-19 and those with a history of other cardiovascular comorbidities had a 30% higher risk of severe COVID-19, the authors commented.
 

J-shaped relationship

Of the total of 6,517 (40%) individuals who had a diagnosis of essential hypertension at baseline, 67% were treated (41% with monotherapy, 59% with combination therapy), and 33% were untreated.

There were similar numbers of severe COVID-19 in each medication group: ACE inhibitors, 34%; angiotensin receptor blockers (ARBs), 36%; and “other” medications 34%.

In hypertensive individuals receiving antihypertensive medications, there was a “J-shaped relationship” between the level of blood pressure and risk of severe COVID-19 when using a systolic blood pressure level of 120-129 mm Hg as a reference – 150-159 mm Hg versus 120-129 mm Hg (OR 1.91; 95% CI, 1.44-2.53), > 180+ mm Hg versus 120-129 mm Hg (OR 1.93; 95% CI, 1.06-3.51).

The authors commented that there was no evidence of a higher risk of severe COVID-19 until systolic blood pressure “exceeded 150 mm Hg.”

They said it was an interesting finding that “very well-controlled” systolic blood pressure < 120 mm Hg was associated with a 40% (OR, 1.40; 95% CI, 1.11-1.78) greater odds of severe COVID-19. “This may be due to reverse causality, where low systolic blood pressure levels may indicate poorer health, such that the occurrence of severe COVID-19 may be related to underlying disease rather than the level of SBP per se,” they suggested.

The J-shaped association observed remained after multiple adjustments, including presence of known cardiovascular comorbidities, which suggested a possible “real effect” of low SBP on severe COVID-19, “at least in treated hypertensive individuals.”

Their analyses also identified that, compared with a “normal” diastolic blood pressure (80-90 mm Hg), having a diastolic blood pressure higher than 90 mm Hg was associated with higher odds of severe COVID-19.

The association between hypertension and COVID-19 was “amplified” if the individuals were treated and their BP remained uncontrolled, the authors pointed out.

There did not appear to be any difference in the risk of severe COVID-19 between individuals taking ACE inhibitors and those taking ARBs or other antihypertensive medications, the authors said.
 

Better understanding of underlying mechanisms needed

Individuals with hypertension who tested positive for COVID-19 had “over twice” the risk of developing severe COVID-19, compared with nonhypertensive individuals, the authors said.

They highlighted that their findings also suggest that there are “further effects” influencing the severity of COVID-19 beyond a “dichotomous” diagnosis of hypertension.

“Individuals with a higher-than-target systolic blood pressure may be less healthy, less active, suffering more severe hypertension, or have developed drug-resistant hypertension, all suggesting that the effects of hypertension have already had detrimental physiological effects on the cardiovascular system, which in turn may offer some explanation for the higher risk of severe COVID-19 with uncontrolled SBP,” they explained.

“Hypertension is an important risk factor for COVID-19,” reiterated the authors, who emphasized that a better understanding of the underlying mechanisms driving this increased risk is warranted in case of “more severe strains or other viruses” in the future.

The authors have declared no competing interests.

A version of this article first appeared on Medscape UK.

U.K. researchers have established that hypertension is associated with a 22% greater risk of severe COVID-19, with the odds of severe COVID-19 unaffected by medication type.

Hypertension “appears to be one of the commonest comorbidities in COVID-19 patients”, explained the authors of a new study, published in PLOS ONE. The authors highlighted that previous research had shown that hypertension was more prevalent in severe and fatal cases compared with all cases of COVID-19.

They pointed out, however, that whether hypertensive individuals have a higher risk of severe COVID-19, compared with nonhypertensives, and whether the absolute level of systolic blood pressure or the type of antihypertensive medication is related to this risk, remained “unclear.”

To try to answer these questions, the research team, led by University of Cambridge researchers, analyzed data from 16,134 individuals who tested positive for COVID-19 (mean age 65.3 years, 47% male, 90% white), 40% were diagnosed with essential hypertension at the analysis baseline – 22% of whom had developed severe COVID-19.

Systolic blood pressure (SBP) was categorized by 10–mm Hg ranges, starting from < 120 mm Hg up to 180+ mm Hg, with the reference category defined as 120-129 mm Hg, based on data from the SPRINT study, which demonstrated that intensive SBP lowering to below 120 mm Hg, as compared with the traditional threshold of 140 mm Hg, was beneficial. Diastolic blood pressure was categorized by 10–mm Hg ranges, starting from < 60 mm Hg up to 100+ mm Hg with 80-90 mm Hg being the reference category.

In their analyses the researchers adjusted for age, sex, body mass index, ethnicity, smoking status, diabetes status, socioeconomic status, and inflammation (C-reactive protein [CRP]), as these were proposed as potential confounders. To assess the direct effect of hypertension on COVID-19, they also adjusted for intermediate variables, including cardiovascular comorbidities and stroke, on the causal pathway between hypertension and severe COVID-19.
 

Majority of effect of hypertension on severe COVID-19 was direct

The unadjusted odds ratio of the association between hypertension and severe COVID-19 was 2.33 (95% confidence interval, 2.16-2.51), the authors emphasized. They found that, after adjusting for all confounding variables, hypertension was associated with 22% higher odds of severe COVID-19 (OR, 1.22; 95% CI, 1.12-1.33), compared with normotension.

Individuals with severe COVID-19 were marginally older, more likely to be male, and more deprived, the authors said. “They were also more likely to be hypertensive, compared with individuals without severe COVID-19, and a greater proportion of individuals with severe COVID-19 had cardiovascular comorbidities.”

The majority of the effect of hypertension on development of severe COVID-19 was “direct,” they said. However, a modest proportion of the effect was mediated via cardiovascular comorbidities such as peripheral vascular disease, MI, coronary heart disease, arrhythmias, and stroke. Of note, those with a history of stroke had a 47% higher risk of severe COVID-19 and those with a history of other cardiovascular comorbidities had a 30% higher risk of severe COVID-19, the authors commented.
 

J-shaped relationship

Of the total of 6,517 (40%) individuals who had a diagnosis of essential hypertension at baseline, 67% were treated (41% with monotherapy, 59% with combination therapy), and 33% were untreated.

There were similar numbers of severe COVID-19 in each medication group: ACE inhibitors, 34%; angiotensin receptor blockers (ARBs), 36%; and “other” medications 34%.

In hypertensive individuals receiving antihypertensive medications, there was a “J-shaped relationship” between the level of blood pressure and risk of severe COVID-19 when using a systolic blood pressure level of 120-129 mm Hg as a reference – 150-159 mm Hg versus 120-129 mm Hg (OR 1.91; 95% CI, 1.44-2.53), > 180+ mm Hg versus 120-129 mm Hg (OR 1.93; 95% CI, 1.06-3.51).

The authors commented that there was no evidence of a higher risk of severe COVID-19 until systolic blood pressure “exceeded 150 mm Hg.”

They said it was an interesting finding that “very well-controlled” systolic blood pressure < 120 mm Hg was associated with a 40% (OR, 1.40; 95% CI, 1.11-1.78) greater odds of severe COVID-19. “This may be due to reverse causality, where low systolic blood pressure levels may indicate poorer health, such that the occurrence of severe COVID-19 may be related to underlying disease rather than the level of SBP per se,” they suggested.

The J-shaped association observed remained after multiple adjustments, including presence of known cardiovascular comorbidities, which suggested a possible “real effect” of low SBP on severe COVID-19, “at least in treated hypertensive individuals.”

Their analyses also identified that, compared with a “normal” diastolic blood pressure (80-90 mm Hg), having a diastolic blood pressure higher than 90 mm Hg was associated with higher odds of severe COVID-19.

The association between hypertension and COVID-19 was “amplified” if the individuals were treated and their BP remained uncontrolled, the authors pointed out.

There did not appear to be any difference in the risk of severe COVID-19 between individuals taking ACE inhibitors and those taking ARBs or other antihypertensive medications, the authors said.
 

Better understanding of underlying mechanisms needed

Individuals with hypertension who tested positive for COVID-19 had “over twice” the risk of developing severe COVID-19, compared with nonhypertensive individuals, the authors said.

They highlighted that their findings also suggest that there are “further effects” influencing the severity of COVID-19 beyond a “dichotomous” diagnosis of hypertension.

“Individuals with a higher-than-target systolic blood pressure may be less healthy, less active, suffering more severe hypertension, or have developed drug-resistant hypertension, all suggesting that the effects of hypertension have already had detrimental physiological effects on the cardiovascular system, which in turn may offer some explanation for the higher risk of severe COVID-19 with uncontrolled SBP,” they explained.

“Hypertension is an important risk factor for COVID-19,” reiterated the authors, who emphasized that a better understanding of the underlying mechanisms driving this increased risk is warranted in case of “more severe strains or other viruses” in the future.

The authors have declared no competing interests.

A version of this article first appeared on Medscape UK.

U.K. researchers have established that hypertension is associated with a 22% greater risk of severe COVID-19, with the odds of severe COVID-19 unaffected by medication type.

Hypertension “appears to be one of the commonest comorbidities in COVID-19 patients”, explained the authors of a new study, published in PLOS ONE. The authors highlighted that previous research had shown that hypertension was more prevalent in severe and fatal cases compared with all cases of COVID-19.

They pointed out, however, that whether hypertensive individuals have a higher risk of severe COVID-19, compared with nonhypertensives, and whether the absolute level of systolic blood pressure or the type of antihypertensive medication is related to this risk, remained “unclear.”

To try to answer these questions, the research team, led by University of Cambridge researchers, analyzed data from 16,134 individuals who tested positive for COVID-19 (mean age 65.3 years, 47% male, 90% white), 40% were diagnosed with essential hypertension at the analysis baseline – 22% of whom had developed severe COVID-19.

Systolic blood pressure (SBP) was categorized by 10–mm Hg ranges, starting from < 120 mm Hg up to 180+ mm Hg, with the reference category defined as 120-129 mm Hg, based on data from the SPRINT study, which demonstrated that intensive SBP lowering to below 120 mm Hg, as compared with the traditional threshold of 140 mm Hg, was beneficial. Diastolic blood pressure was categorized by 10–mm Hg ranges, starting from < 60 mm Hg up to 100+ mm Hg with 80-90 mm Hg being the reference category.

In their analyses the researchers adjusted for age, sex, body mass index, ethnicity, smoking status, diabetes status, socioeconomic status, and inflammation (C-reactive protein [CRP]), as these were proposed as potential confounders. To assess the direct effect of hypertension on COVID-19, they also adjusted for intermediate variables, including cardiovascular comorbidities and stroke, on the causal pathway between hypertension and severe COVID-19.
 

Majority of effect of hypertension on severe COVID-19 was direct

The unadjusted odds ratio of the association between hypertension and severe COVID-19 was 2.33 (95% confidence interval, 2.16-2.51), the authors emphasized. They found that, after adjusting for all confounding variables, hypertension was associated with 22% higher odds of severe COVID-19 (OR, 1.22; 95% CI, 1.12-1.33), compared with normotension.

Individuals with severe COVID-19 were marginally older, more likely to be male, and more deprived, the authors said. “They were also more likely to be hypertensive, compared with individuals without severe COVID-19, and a greater proportion of individuals with severe COVID-19 had cardiovascular comorbidities.”

The majority of the effect of hypertension on development of severe COVID-19 was “direct,” they said. However, a modest proportion of the effect was mediated via cardiovascular comorbidities such as peripheral vascular disease, MI, coronary heart disease, arrhythmias, and stroke. Of note, those with a history of stroke had a 47% higher risk of severe COVID-19 and those with a history of other cardiovascular comorbidities had a 30% higher risk of severe COVID-19, the authors commented.
 

J-shaped relationship

Of the total of 6,517 (40%) individuals who had a diagnosis of essential hypertension at baseline, 67% were treated (41% with monotherapy, 59% with combination therapy), and 33% were untreated.

There were similar numbers of severe COVID-19 in each medication group: ACE inhibitors, 34%; angiotensin receptor blockers (ARBs), 36%; and “other” medications 34%.

In hypertensive individuals receiving antihypertensive medications, there was a “J-shaped relationship” between the level of blood pressure and risk of severe COVID-19 when using a systolic blood pressure level of 120-129 mm Hg as a reference – 150-159 mm Hg versus 120-129 mm Hg (OR 1.91; 95% CI, 1.44-2.53), > 180+ mm Hg versus 120-129 mm Hg (OR 1.93; 95% CI, 1.06-3.51).

The authors commented that there was no evidence of a higher risk of severe COVID-19 until systolic blood pressure “exceeded 150 mm Hg.”

They said it was an interesting finding that “very well-controlled” systolic blood pressure < 120 mm Hg was associated with a 40% (OR, 1.40; 95% CI, 1.11-1.78) greater odds of severe COVID-19. “This may be due to reverse causality, where low systolic blood pressure levels may indicate poorer health, such that the occurrence of severe COVID-19 may be related to underlying disease rather than the level of SBP per se,” they suggested.

The J-shaped association observed remained after multiple adjustments, including presence of known cardiovascular comorbidities, which suggested a possible “real effect” of low SBP on severe COVID-19, “at least in treated hypertensive individuals.”

Their analyses also identified that, compared with a “normal” diastolic blood pressure (80-90 mm Hg), having a diastolic blood pressure higher than 90 mm Hg was associated with higher odds of severe COVID-19.

The association between hypertension and COVID-19 was “amplified” if the individuals were treated and their BP remained uncontrolled, the authors pointed out.

There did not appear to be any difference in the risk of severe COVID-19 between individuals taking ACE inhibitors and those taking ARBs or other antihypertensive medications, the authors said.
 

Better understanding of underlying mechanisms needed

Individuals with hypertension who tested positive for COVID-19 had “over twice” the risk of developing severe COVID-19, compared with nonhypertensive individuals, the authors said.

They highlighted that their findings also suggest that there are “further effects” influencing the severity of COVID-19 beyond a “dichotomous” diagnosis of hypertension.

“Individuals with a higher-than-target systolic blood pressure may be less healthy, less active, suffering more severe hypertension, or have developed drug-resistant hypertension, all suggesting that the effects of hypertension have already had detrimental physiological effects on the cardiovascular system, which in turn may offer some explanation for the higher risk of severe COVID-19 with uncontrolled SBP,” they explained.

“Hypertension is an important risk factor for COVID-19,” reiterated the authors, who emphasized that a better understanding of the underlying mechanisms driving this increased risk is warranted in case of “more severe strains or other viruses” in the future.

The authors have declared no competing interests.

A version of this article first appeared on Medscape UK.

Roughly 7% of all adult Americans may currently have had long COVID, with symptoms that have lasted 3 months or longer, according to the latest U.S. government survey done in October. More than a quarter say their condition is severe enough to significantly limit their day-to-day activities – yet the problem is only barely starting to get the attention of employers, the health care system, and policymakers.

With no cure or treatment in sight, long COVID is already burdening not only the health care system, but also the economy – and that burden is set to grow. Many experts worry about the possible long-term ripple effects, from increased spending on medical care costs to lost wages due to not being able to work, as well as the policy implications that come with addressing these issues.

“At this point, anyone who’s looking at this seriously would say this is a huge deal,” says senior Brookings Institution fellow Katie Bach, the author of a study that analyzed long COVID’s impact on the labor market.

“We need a real concerted focus on treating these people, which means both research and the clinical side, and figuring out how to build a labor market that is more inclusive of people with disabilities,” she said.

It’s not only that many people are affected. It’s that they are often affected for months and possibly even years.

The U.S. government figures suggest more than 18 million people could have symptoms of long COVID right now. The latest Household Pulse Survey by the Census Bureau and the National Center for Health Statistics takes data from 41,415 people.

A preprint of a study by researchers from City University of New York, posted on medRxiv in September and based on a similar population survey done between June 30 and July 2, drew comparable results. The study has not been peer reviewed.

More than 7% of all those who answered said they had long COVID at the time of the survey, which the researchers said corresponded to approximately 18.5 million U.S. adults. The same study found that a quarter of those, or an estimated 4.7 million adults, said their daily activities were impacted “a lot.”

This can translate into pain not only for the patients, but for governments and employers, too.

In high-income countries around the world, government surveys and other studies are shedding light on the extent to which post-COVID-19 symptoms – commonly known as long COVID – are affecting populations. While results vary, they generally fall within similar ranges.

The World Health Organization estimates that between 10% and 20% of those with COVID-19 go on to have an array of medium- to long-term post-COVID-19 symptoms that range from mild to debilitating. The U.S. Government Accountability Office puts that estimate at 10% to 30%; one of the latest studies published at the end of October in The Journal of the American Medical Association found that 15% of U.S. adults who had tested positive for COVID-19 reported current long COVID symptoms. Elsewhere, a study from the Netherlands published in The Lancet in August found that one in eight COVID-19 cases, or 12.7%, were likely to become long COVID.

“It’s very clear that the condition is devastating people’s lives and livelihoods,” WHO Director-General Tedros Adhanom Ghebreyesus wrote in an article for The Guardian newspaper in October.

“The world has already lost a significant number of the workforce to illness, death, fatigue, unplanned retirement due to an increase in long-term disability, which not only impacts the health system, but is a hit to the overarching economy … the impact of long COVID for all countries is very serious and needs immediate and sustained action equivalent to its scale.”
 

Global snapshot: Lasting symptoms, impact on activities

Patients describe a spectrum of persistent issues, with extreme fatigue, brain fog or cognitive problems, and shortness of breath among the most common complaints. Many also have manageable symptoms that worsen significantly after even mild physical or mental exertion.

Women appear almost twice as likely as men to get long COVID. Many patients have other medical conditions and disabilities that make them more vulnerable to the condition. Those who face greater obstacles accessing health care due to discrimination or socioeconomic inequity are at higher risk as well. 

While many are older, a large number are also in their prime working age. The Census Bureau data show that people ages 40-49 are more likely than any other group to get long COVID, which has broader implications for labor markets and the global economy. Already, experts have estimated that long COVID is likely to cost the U.S. trillions of dollars and affect multiple industries.

“Whether they’re in the financial world, the medical system, lawyers, they’re telling me they’re sitting at the computer screen and they’re unable to process the data,” said Zachary Schwartz, MD, medical director for Vancouver General Hospital’s Post-COVID-19 Recovery Clinic.

“That is what’s most distressing for people, in that they’re not working, they’re not making money, and they don’t know when, or if, they’re going to get better.”

Nearly a third of respondents in the Census Bureau’s Household Pulse Survey who said they have had COVID-19 reported symptoms that lasted 3 months or longer. People between the ages of 30 and 59 were the most affected, with about 32% reporting symptoms. Across the entire adult U.S. population, the survey found that 1 in 7 adults have had long COVID at some point during the pandemic, with about 1 in 18 saying it limited their activity to some degree, and 1 in 50 saying they have faced “a lot” of limits on their activities. Any way these numbers are dissected, long COVID has impacted a large swath of the population.

Yet research into the causes and possible treatments of long COVID is just getting underway.

“The amount of energy and time devoted to it is way, way less than it should, given how many people are likely affected,” said David Cutler, PhD, professor of economics at Harvard University, Cambridge, Mass., who has written about the economic cost of long COVID. “We’re way, way underdoing it here. And I think that’s really a terrible thing.”

Population surveys and studies from around the world show that long COVID lives up to its name, with people reporting serious symptoms for months on end.

In October, Statistics Canada and the Public Health Agency of Canada published early results from a questionnaire done between spring and summer 2022 that found just under 15% of adults who had a confirmed or suspected case of COVID-19 went on to have new or continuing symptoms 3 or more months later. Nearly half, or 47.3%, dealt with symptoms that lasted a year or more. More than one in five said their symptoms “often or always” limited their day-to-day activities, which included routine tasks such as preparing meals, doing errands and chores, and basic functions such as personal care and moving around in their homes.

Nearly three-quarters of workers or students said they missed an average of 20 days of work or school. 

“We haven’t yet been able to determine exactly when symptoms resolve,” said Rainu Kaushal, MD, the senior associate dean for clinical research at Weill Cornell Medicine in New York. She is co-leading a national study on long COVID in adults and children, funded by the National Institutes of Health RECOVER Initiative.

“But there does seem to be, for many of the milder symptoms, resolution at about 4-6 weeks. There seems to be a second point of resolution around 6 months for certain symptoms, and then some symptoms do seem to be permanent, and those tend to be patients who have underlying conditions,” she said.
 

Reducing the risk

Given all the data so far, experts recommend urgent policy changes to help people with long COVID.

“The population needs to be prepared, that understanding long COVID is going to be a very long and difficult process,” said Alexander Charney, MD, PhD, associate professor and the lead principal investigator of the RECOVER adult cohort at Icahn School of Medicine at Mount Sinai in New York. He said the government can do a great deal to help, including setting up a network of connected clinics treating long COVID, standardizing best practices, and sharing information.

“That would go a long way towards making sure that every person feels like they’re not too far away from a clinic where they can get treated for this particular condition,” he said.

But the only known way to prevent long COVID is to prevent COVID-19 infections in the first place, experts say. That means equitable access to tests, therapeutics, and vaccines.

“I will say that avoiding COVID remains the best treatment in the arsenal right now,” said Dr. Kaushal. This means masking, avoiding crowded places with poor ventilation and high exposure risk, and being up to date on vaccinations, she said.

A number of papers – including a large U.K. study published in May 2022, another one from July, and the JAMA study from October – all suggest that vaccinations can help reduce the risk of long COVID.

“I am absolutely of the belief that vaccination has reduced the incidence and overall amount of long COVID … [and is] still by far the best thing the public can do,” said Dr. Schwartz.

A version of this article first appeared on WebMD.com.

Roughly 7% of all adult Americans may currently have had long COVID, with symptoms that have lasted 3 months or longer, according to the latest U.S. government survey done in October. More than a quarter say their condition is severe enough to significantly limit their day-to-day activities – yet the problem is only barely starting to get the attention of employers, the health care system, and policymakers.

With no cure or treatment in sight, long COVID is already burdening not only the health care system, but also the economy – and that burden is set to grow. Many experts worry about the possible long-term ripple effects, from increased spending on medical care costs to lost wages due to not being able to work, as well as the policy implications that come with addressing these issues.

“At this point, anyone who’s looking at this seriously would say this is a huge deal,” says senior Brookings Institution fellow Katie Bach, the author of a study that analyzed long COVID’s impact on the labor market.

“We need a real concerted focus on treating these people, which means both research and the clinical side, and figuring out how to build a labor market that is more inclusive of people with disabilities,” she said.

It’s not only that many people are affected. It’s that they are often affected for months and possibly even years.

The U.S. government figures suggest more than 18 million people could have symptoms of long COVID right now. The latest Household Pulse Survey by the Census Bureau and the National Center for Health Statistics takes data from 41,415 people.

A preprint of a study by researchers from City University of New York, posted on medRxiv in September and based on a similar population survey done between June 30 and July 2, drew comparable results. The study has not been peer reviewed.

More than 7% of all those who answered said they had long COVID at the time of the survey, which the researchers said corresponded to approximately 18.5 million U.S. adults. The same study found that a quarter of those, or an estimated 4.7 million adults, said their daily activities were impacted “a lot.”

This can translate into pain not only for the patients, but for governments and employers, too.

In high-income countries around the world, government surveys and other studies are shedding light on the extent to which post-COVID-19 symptoms – commonly known as long COVID – are affecting populations. While results vary, they generally fall within similar ranges.

The World Health Organization estimates that between 10% and 20% of those with COVID-19 go on to have an array of medium- to long-term post-COVID-19 symptoms that range from mild to debilitating. The U.S. Government Accountability Office puts that estimate at 10% to 30%; one of the latest studies published at the end of October in The Journal of the American Medical Association found that 15% of U.S. adults who had tested positive for COVID-19 reported current long COVID symptoms. Elsewhere, a study from the Netherlands published in The Lancet in August found that one in eight COVID-19 cases, or 12.7%, were likely to become long COVID.

“It’s very clear that the condition is devastating people’s lives and livelihoods,” WHO Director-General Tedros Adhanom Ghebreyesus wrote in an article for The Guardian newspaper in October.

“The world has already lost a significant number of the workforce to illness, death, fatigue, unplanned retirement due to an increase in long-term disability, which not only impacts the health system, but is a hit to the overarching economy … the impact of long COVID for all countries is very serious and needs immediate and sustained action equivalent to its scale.”
 

Global snapshot: Lasting symptoms, impact on activities

Patients describe a spectrum of persistent issues, with extreme fatigue, brain fog or cognitive problems, and shortness of breath among the most common complaints. Many also have manageable symptoms that worsen significantly after even mild physical or mental exertion.

Women appear almost twice as likely as men to get long COVID. Many patients have other medical conditions and disabilities that make them more vulnerable to the condition. Those who face greater obstacles accessing health care due to discrimination or socioeconomic inequity are at higher risk as well. 

While many are older, a large number are also in their prime working age. The Census Bureau data show that people ages 40-49 are more likely than any other group to get long COVID, which has broader implications for labor markets and the global economy. Already, experts have estimated that long COVID is likely to cost the U.S. trillions of dollars and affect multiple industries.

“Whether they’re in the financial world, the medical system, lawyers, they’re telling me they’re sitting at the computer screen and they’re unable to process the data,” said Zachary Schwartz, MD, medical director for Vancouver General Hospital’s Post-COVID-19 Recovery Clinic.

“That is what’s most distressing for people, in that they’re not working, they’re not making money, and they don’t know when, or if, they’re going to get better.”

Nearly a third of respondents in the Census Bureau’s Household Pulse Survey who said they have had COVID-19 reported symptoms that lasted 3 months or longer. People between the ages of 30 and 59 were the most affected, with about 32% reporting symptoms. Across the entire adult U.S. population, the survey found that 1 in 7 adults have had long COVID at some point during the pandemic, with about 1 in 18 saying it limited their activity to some degree, and 1 in 50 saying they have faced “a lot” of limits on their activities. Any way these numbers are dissected, long COVID has impacted a large swath of the population.

Yet research into the causes and possible treatments of long COVID is just getting underway.

“The amount of energy and time devoted to it is way, way less than it should, given how many people are likely affected,” said David Cutler, PhD, professor of economics at Harvard University, Cambridge, Mass., who has written about the economic cost of long COVID. “We’re way, way underdoing it here. And I think that’s really a terrible thing.”

Population surveys and studies from around the world show that long COVID lives up to its name, with people reporting serious symptoms for months on end.

In October, Statistics Canada and the Public Health Agency of Canada published early results from a questionnaire done between spring and summer 2022 that found just under 15% of adults who had a confirmed or suspected case of COVID-19 went on to have new or continuing symptoms 3 or more months later. Nearly half, or 47.3%, dealt with symptoms that lasted a year or more. More than one in five said their symptoms “often or always” limited their day-to-day activities, which included routine tasks such as preparing meals, doing errands and chores, and basic functions such as personal care and moving around in their homes.

Nearly three-quarters of workers or students said they missed an average of 20 days of work or school. 

“We haven’t yet been able to determine exactly when symptoms resolve,” said Rainu Kaushal, MD, the senior associate dean for clinical research at Weill Cornell Medicine in New York. She is co-leading a national study on long COVID in adults and children, funded by the National Institutes of Health RECOVER Initiative.

“But there does seem to be, for many of the milder symptoms, resolution at about 4-6 weeks. There seems to be a second point of resolution around 6 months for certain symptoms, and then some symptoms do seem to be permanent, and those tend to be patients who have underlying conditions,” she said.
 

Reducing the risk

Given all the data so far, experts recommend urgent policy changes to help people with long COVID.

“The population needs to be prepared, that understanding long COVID is going to be a very long and difficult process,” said Alexander Charney, MD, PhD, associate professor and the lead principal investigator of the RECOVER adult cohort at Icahn School of Medicine at Mount Sinai in New York. He said the government can do a great deal to help, including setting up a network of connected clinics treating long COVID, standardizing best practices, and sharing information.

“That would go a long way towards making sure that every person feels like they’re not too far away from a clinic where they can get treated for this particular condition,” he said.

But the only known way to prevent long COVID is to prevent COVID-19 infections in the first place, experts say. That means equitable access to tests, therapeutics, and vaccines.

“I will say that avoiding COVID remains the best treatment in the arsenal right now,” said Dr. Kaushal. This means masking, avoiding crowded places with poor ventilation and high exposure risk, and being up to date on vaccinations, she said.

A number of papers – including a large U.K. study published in May 2022, another one from July, and the JAMA study from October – all suggest that vaccinations can help reduce the risk of long COVID.

“I am absolutely of the belief that vaccination has reduced the incidence and overall amount of long COVID … [and is] still by far the best thing the public can do,” said Dr. Schwartz.

A version of this article first appeared on WebMD.com.

Roughly 7% of all adult Americans may currently have had long COVID, with symptoms that have lasted 3 months or longer, according to the latest U.S. government survey done in October. More than a quarter say their condition is severe enough to significantly limit their day-to-day activities – yet the problem is only barely starting to get the attention of employers, the health care system, and policymakers.

With no cure or treatment in sight, long COVID is already burdening not only the health care system, but also the economy – and that burden is set to grow. Many experts worry about the possible long-term ripple effects, from increased spending on medical care costs to lost wages due to not being able to work, as well as the policy implications that come with addressing these issues.

“At this point, anyone who’s looking at this seriously would say this is a huge deal,” says senior Brookings Institution fellow Katie Bach, the author of a study that analyzed long COVID’s impact on the labor market.

“We need a real concerted focus on treating these people, which means both research and the clinical side, and figuring out how to build a labor market that is more inclusive of people with disabilities,” she said.

It’s not only that many people are affected. It’s that they are often affected for months and possibly even years.

The U.S. government figures suggest more than 18 million people could have symptoms of long COVID right now. The latest Household Pulse Survey by the Census Bureau and the National Center for Health Statistics takes data from 41,415 people.

A preprint of a study by researchers from City University of New York, posted on medRxiv in September and based on a similar population survey done between June 30 and July 2, drew comparable results. The study has not been peer reviewed.

More than 7% of all those who answered said they had long COVID at the time of the survey, which the researchers said corresponded to approximately 18.5 million U.S. adults. The same study found that a quarter of those, or an estimated 4.7 million adults, said their daily activities were impacted “a lot.”

This can translate into pain not only for the patients, but for governments and employers, too.

In high-income countries around the world, government surveys and other studies are shedding light on the extent to which post-COVID-19 symptoms – commonly known as long COVID – are affecting populations. While results vary, they generally fall within similar ranges.

The World Health Organization estimates that between 10% and 20% of those with COVID-19 go on to have an array of medium- to long-term post-COVID-19 symptoms that range from mild to debilitating. The U.S. Government Accountability Office puts that estimate at 10% to 30%; one of the latest studies published at the end of October in The Journal of the American Medical Association found that 15% of U.S. adults who had tested positive for COVID-19 reported current long COVID symptoms. Elsewhere, a study from the Netherlands published in The Lancet in August found that one in eight COVID-19 cases, or 12.7%, were likely to become long COVID.

“It’s very clear that the condition is devastating people’s lives and livelihoods,” WHO Director-General Tedros Adhanom Ghebreyesus wrote in an article for The Guardian newspaper in October.

“The world has already lost a significant number of the workforce to illness, death, fatigue, unplanned retirement due to an increase in long-term disability, which not only impacts the health system, but is a hit to the overarching economy … the impact of long COVID for all countries is very serious and needs immediate and sustained action equivalent to its scale.”
 

Global snapshot: Lasting symptoms, impact on activities

Patients describe a spectrum of persistent issues, with extreme fatigue, brain fog or cognitive problems, and shortness of breath among the most common complaints. Many also have manageable symptoms that worsen significantly after even mild physical or mental exertion.

Women appear almost twice as likely as men to get long COVID. Many patients have other medical conditions and disabilities that make them more vulnerable to the condition. Those who face greater obstacles accessing health care due to discrimination or socioeconomic inequity are at higher risk as well. 

While many are older, a large number are also in their prime working age. The Census Bureau data show that people ages 40-49 are more likely than any other group to get long COVID, which has broader implications for labor markets and the global economy. Already, experts have estimated that long COVID is likely to cost the U.S. trillions of dollars and affect multiple industries.

“Whether they’re in the financial world, the medical system, lawyers, they’re telling me they’re sitting at the computer screen and they’re unable to process the data,” said Zachary Schwartz, MD, medical director for Vancouver General Hospital’s Post-COVID-19 Recovery Clinic.

“That is what’s most distressing for people, in that they’re not working, they’re not making money, and they don’t know when, or if, they’re going to get better.”

Nearly a third of respondents in the Census Bureau’s Household Pulse Survey who said they have had COVID-19 reported symptoms that lasted 3 months or longer. People between the ages of 30 and 59 were the most affected, with about 32% reporting symptoms. Across the entire adult U.S. population, the survey found that 1 in 7 adults have had long COVID at some point during the pandemic, with about 1 in 18 saying it limited their activity to some degree, and 1 in 50 saying they have faced “a lot” of limits on their activities. Any way these numbers are dissected, long COVID has impacted a large swath of the population.

Yet research into the causes and possible treatments of long COVID is just getting underway.

“The amount of energy and time devoted to it is way, way less than it should, given how many people are likely affected,” said David Cutler, PhD, professor of economics at Harvard University, Cambridge, Mass., who has written about the economic cost of long COVID. “We’re way, way underdoing it here. And I think that’s really a terrible thing.”

Population surveys and studies from around the world show that long COVID lives up to its name, with people reporting serious symptoms for months on end.

In October, Statistics Canada and the Public Health Agency of Canada published early results from a questionnaire done between spring and summer 2022 that found just under 15% of adults who had a confirmed or suspected case of COVID-19 went on to have new or continuing symptoms 3 or more months later. Nearly half, or 47.3%, dealt with symptoms that lasted a year or more. More than one in five said their symptoms “often or always” limited their day-to-day activities, which included routine tasks such as preparing meals, doing errands and chores, and basic functions such as personal care and moving around in their homes.

Nearly three-quarters of workers or students said they missed an average of 20 days of work or school. 

“We haven’t yet been able to determine exactly when symptoms resolve,” said Rainu Kaushal, MD, the senior associate dean for clinical research at Weill Cornell Medicine in New York. She is co-leading a national study on long COVID in adults and children, funded by the National Institutes of Health RECOVER Initiative.

“But there does seem to be, for many of the milder symptoms, resolution at about 4-6 weeks. There seems to be a second point of resolution around 6 months for certain symptoms, and then some symptoms do seem to be permanent, and those tend to be patients who have underlying conditions,” she said.
 

Reducing the risk

Given all the data so far, experts recommend urgent policy changes to help people with long COVID.

“The population needs to be prepared, that understanding long COVID is going to be a very long and difficult process,” said Alexander Charney, MD, PhD, associate professor and the lead principal investigator of the RECOVER adult cohort at Icahn School of Medicine at Mount Sinai in New York. He said the government can do a great deal to help, including setting up a network of connected clinics treating long COVID, standardizing best practices, and sharing information.

“That would go a long way towards making sure that every person feels like they’re not too far away from a clinic where they can get treated for this particular condition,” he said.

But the only known way to prevent long COVID is to prevent COVID-19 infections in the first place, experts say. That means equitable access to tests, therapeutics, and vaccines.

“I will say that avoiding COVID remains the best treatment in the arsenal right now,” said Dr. Kaushal. This means masking, avoiding crowded places with poor ventilation and high exposure risk, and being up to date on vaccinations, she said.

A number of papers – including a large U.K. study published in May 2022, another one from July, and the JAMA study from October – all suggest that vaccinations can help reduce the risk of long COVID.

“I am absolutely of the belief that vaccination has reduced the incidence and overall amount of long COVID … [and is] still by far the best thing the public can do,” said Dr. Schwartz.

A version of this article first appeared on WebMD.com.

To the Editor:

The Moderna COVID-19 messenger RNA (mRNA) vaccine was authorized for use on December 18, 2020, with the second dose beginning on January 15, 2021.^1-3 Some individuals who received the Moderna vaccine experienced an intense rash known as “COVID arm,” a harmless but bothersome adverse effect that typically appears within a week and is a localized and transient immunogenic response.⁴ COVID arm differs from most vaccine adverse effects. The rash emerges not immediately but 5 to 9 days after the initial dose—on average, 1 week later. Apart from being itchy, the rash does not appear to be harmful and is not a reason to hesitate getting vaccinated.

Dermatologists and allergists have been studying this adverse effect, which has been formally termed delayed cutaneous hypersensitivity. Of potential clinical consequence is that the efficacy of the mRNA COVID-19 vaccine may be harmed if postvaccination dermal reactions necessitate systemic corticosteroid therapy. Because this vaccine stimulates an immune response as viral RNA integrates in cells secondary to production of the spike protein of the virus, the skin may be affected secondarily and manifestations of any underlying disease may be aggravated.⁵ We report a patient who developed a psoriasiform dermatitis after the first dose of the Moderna vaccine.

A 65-year-old woman presented to her primary care physician because of the severity of psoriasiform dermatitis that developed 5 days after she received the first dose of the Moderna COVID-19 mRNA vaccine. The patient had a medical history of Sjögren syndrome. Her medication history was negative, and her family history was negative for autoimmune disease. Physical examination by primary care revealed an erythematous scaly rash with plaques and papules on the neck and back (Figure 1). The patient presented again to primary care 2 days later with swollen, painful, discolored digits (Figure 2) and a stiff, sore neck.

Laboratory results were positive for anti–Sjögren syndrome–related antigens A and B. A complete blood cell count; comprehensive metabolic panel; erythrocyte sedimentation rate; and assays of rheumatoid factor, C-reactive protein, and anti–cyclic citrullinated peptide were within reference range. A biopsy of a lesion on the back showed psoriasiform dermatitis with confluent parakeratosis and scattered necrotic keratinocytes. There was superficial perivascular inflammation with rare eosinophils (Figure 3).

The patient was treated with a course of systemic corticosteroids. The rash resolved in 1 week. She did not receive the second dose due to the rash.

Two mRNA COVID-19 vaccines—Pfizer BioNTech and Moderna—have been granted emergency use authorization by the US Food and Drug Administration.⁶ The safety profile of the mRNA-1273 vaccine for the median 2-month follow-up showed no safety concerns.³ Minor localized adverse effects (eg, pain, redness, swelling) have been observed more frequently with the vaccines than with placebo. Systemic symptoms, such as fever, fatigue, headache, and muscle and joint pain, also were seen somewhat more often with the vaccines than with placebo; most such effects occurred 24 to 48 hours after vaccination.^3,6,7 The frequency of unsolicited adverse events and serious adverse events reported during the 28-day period after vaccination generally was similar among participants in the vaccine and placebo groups.³

There are 2 types of reactions to COVID-19 vaccination: immediate and delayed. Immediate reactions usually are due to anaphylaxis, requiring prompt recognition and treatment with epinephrine to stop rapid progression of life-threatening symptoms. Delayed reactions include localized reactions, such as urticaria and benign exanthema; serum sickness and serum sickness–like reactions; fever; and rare skin, organ, and neurologic sequelae.^1,6-8

Cutaneous manifestations, present in 16% to 50% of patients with Sjögren syndrome, are considered one of the most common extraglandular presentations of the syndrome. They are classified as nonvascular (eg, xerosis, angular cheilitis, eyelid dermatitis, annular erythema) and vascular (eg, Raynaud phenomenon, vasculitis).^9-11 Our patient did not have any of those findings. She had not taken any medications before the rash appeared, thereby ruling out a drug reaction.

The differential for our patient included post–urinary tract infection immune-reactive arthritis and rash, which is not typical with Escherichia coli infection but is described with infection with Chlamydia species and Salmonella species. Moreover, post–urinary tract infection immune-reactive arthritis and rash appear mostly on the palms and soles. Systemic lupus erythematosus–like rashes have a different histology and appear on sun-exposed areas; our patient’s rash was found mainly on unexposed areas.¹²

Because our patient received the Moderna vaccine 5 days before the rash appeared and later developed swelling of the digits with morning stiffness, a delayed serum sickness–like reaction secondary to COVID-19 vaccination was possible.^3,6

COVID-19 mRNA vaccines developed by Pfizer-BioNTech and Moderna incorporate a lipid-based nanoparticle carrier system that prevents rapid enzymatic degradation of mRNA and facilitates in vivo delivery of mRNA. This lipid-based nanoparticle carrier system is further stabilized by a polyethylene glycol 2000 lipid conjugate that provides a hydrophilic layer, thus prolonging half-life. The presence of lipid polyethylene glycol 2000 in mRNA vaccines has led to concern that this component could be implicated in anaphylaxis.⁶

COVID-19 antigens can give rise to varying clinical manifestations that are directly related to viral tissue damage or are indirectly induced by the antiviral immune response.^13,14 Hyperactivation of the immune system to eradicate COVID-19 may trigger autoimmunity; several immune-mediated disorders have been described in individuals infected with SARS-CoV-2. Dermal manifestations include cutaneous rash and vasculitis.^13-16 Crucial immunologic steps occur during SARS-CoV-2 infection that may link autoimmunity to COVID-19.^13,14 In preliminary published data on the efficacy of the Moderna vaccine on 45 trial enrollees, 3 did not receive the second dose of vaccination, including 1 who developed urticaria on both legs 5 days after the first dose.¹

Introduction of viral RNA can induce autoimmunity that can be explained by various phenomena, including epitope spreading, molecular mimicry, cryptic antigen, and bystander activation. Remarkably, more than one-third of immunogenic proteins in SARS-CoV-2 have potentially problematic homology to proteins that are key to the human adaptive immune system.⁵

Moreover, SARS-CoV-2 seems to induce organ injury through alternative mechanisms beyond direct viral infection, including immunologic injury. In some situations, hyperactivation of the immune response to SARS-CoV-2 RNA can result in autoimmune disease. COVID-19 has been associated with immune-mediated systemic or organ-selective manifestations, some of which fulfill the diagnostic or classification criteria of specific autoimmune diseases. It is unclear whether those medical disorders are the result of transitory postinfectious epiphenomena.⁵

A few studies have shown that patients with rheumatic disease have an incidence and prevalence of COVID-19 that is similar to the general population. A similar pattern has been detected in COVID-19 morbidity and mortality rates, even among patients with an autoimmune disease, such as rheumatoid arthritis and Sjögren syndrome.^5,17 Furthermore, exacerbation of preexisting rheumatic symptoms may be due to hyperactivation of antiviral pathways in a person with an autoimmune disease.^17-19 The findings in our patient suggested a direct role for the vaccine in skin manifestations, rather than for reactivation or development of new systemic autoimmune processes, such as systemic lupus erythematosus.

Exacerbation of psoriasis following COVID-19 vaccination has been described²⁰; however, the case patient did not have a history of psoriasis. The mechanism(s) of such exacerbation remain unclear; COVID-19 vaccine–induced helper T cells (T_H17) may play a role.²¹ Other skin manifestations encountered following COVID-19 vaccination include lichen planus, leukocytoclastic vasculitic rash, erythema multiforme–like rash, and pityriasis rosea–like rash.^22-25 The immune mechanisms of these manifestations remain unclear.

The clinical presentation of delayed vaccination reactions can be attributed to the timing of symptoms and, in this case, the immune-mediated background of a psoriasiform reaction. Although adverse reactions to the SARS-CoV-2 mRNA vaccine are rare, more individuals should be studied after vaccination to confirm and better understand this phenomenon.

To the Editor:

The Moderna COVID-19 messenger RNA (mRNA) vaccine was authorized for use on December 18, 2020, with the second dose beginning on January 15, 2021.^1-3 Some individuals who received the Moderna vaccine experienced an intense rash known as “COVID arm,” a harmless but bothersome adverse effect that typically appears within a week and is a localized and transient immunogenic response.⁴ COVID arm differs from most vaccine adverse effects. The rash emerges not immediately but 5 to 9 days after the initial dose—on average, 1 week later. Apart from being itchy, the rash does not appear to be harmful and is not a reason to hesitate getting vaccinated.

Dermatologists and allergists have been studying this adverse effect, which has been formally termed delayed cutaneous hypersensitivity. Of potential clinical consequence is that the efficacy of the mRNA COVID-19 vaccine may be harmed if postvaccination dermal reactions necessitate systemic corticosteroid therapy. Because this vaccine stimulates an immune response as viral RNA integrates in cells secondary to production of the spike protein of the virus, the skin may be affected secondarily and manifestations of any underlying disease may be aggravated.⁵ We report a patient who developed a psoriasiform dermatitis after the first dose of the Moderna vaccine.

A 65-year-old woman presented to her primary care physician because of the severity of psoriasiform dermatitis that developed 5 days after she received the first dose of the Moderna COVID-19 mRNA vaccine. The patient had a medical history of Sjögren syndrome. Her medication history was negative, and her family history was negative for autoimmune disease. Physical examination by primary care revealed an erythematous scaly rash with plaques and papules on the neck and back (Figure 1). The patient presented again to primary care 2 days later with swollen, painful, discolored digits (Figure 2) and a stiff, sore neck.

Laboratory results were positive for anti–Sjögren syndrome–related antigens A and B. A complete blood cell count; comprehensive metabolic panel; erythrocyte sedimentation rate; and assays of rheumatoid factor, C-reactive protein, and anti–cyclic citrullinated peptide were within reference range. A biopsy of a lesion on the back showed psoriasiform dermatitis with confluent parakeratosis and scattered necrotic keratinocytes. There was superficial perivascular inflammation with rare eosinophils (Figure 3).

The patient was treated with a course of systemic corticosteroids. The rash resolved in 1 week. She did not receive the second dose due to the rash.

Two mRNA COVID-19 vaccines—Pfizer BioNTech and Moderna—have been granted emergency use authorization by the US Food and Drug Administration.⁶ The safety profile of the mRNA-1273 vaccine for the median 2-month follow-up showed no safety concerns.³ Minor localized adverse effects (eg, pain, redness, swelling) have been observed more frequently with the vaccines than with placebo. Systemic symptoms, such as fever, fatigue, headache, and muscle and joint pain, also were seen somewhat more often with the vaccines than with placebo; most such effects occurred 24 to 48 hours after vaccination.^3,6,7 The frequency of unsolicited adverse events and serious adverse events reported during the 28-day period after vaccination generally was similar among participants in the vaccine and placebo groups.³

There are 2 types of reactions to COVID-19 vaccination: immediate and delayed. Immediate reactions usually are due to anaphylaxis, requiring prompt recognition and treatment with epinephrine to stop rapid progression of life-threatening symptoms. Delayed reactions include localized reactions, such as urticaria and benign exanthema; serum sickness and serum sickness–like reactions; fever; and rare skin, organ, and neurologic sequelae.^1,6-8

Cutaneous manifestations, present in 16% to 50% of patients with Sjögren syndrome, are considered one of the most common extraglandular presentations of the syndrome. They are classified as nonvascular (eg, xerosis, angular cheilitis, eyelid dermatitis, annular erythema) and vascular (eg, Raynaud phenomenon, vasculitis).^9-11 Our patient did not have any of those findings. She had not taken any medications before the rash appeared, thereby ruling out a drug reaction.

The differential for our patient included post–urinary tract infection immune-reactive arthritis and rash, which is not typical with Escherichia coli infection but is described with infection with Chlamydia species and Salmonella species. Moreover, post–urinary tract infection immune-reactive arthritis and rash appear mostly on the palms and soles. Systemic lupus erythematosus–like rashes have a different histology and appear on sun-exposed areas; our patient’s rash was found mainly on unexposed areas.¹²

Because our patient received the Moderna vaccine 5 days before the rash appeared and later developed swelling of the digits with morning stiffness, a delayed serum sickness–like reaction secondary to COVID-19 vaccination was possible.^3,6

COVID-19 mRNA vaccines developed by Pfizer-BioNTech and Moderna incorporate a lipid-based nanoparticle carrier system that prevents rapid enzymatic degradation of mRNA and facilitates in vivo delivery of mRNA. This lipid-based nanoparticle carrier system is further stabilized by a polyethylene glycol 2000 lipid conjugate that provides a hydrophilic layer, thus prolonging half-life. The presence of lipid polyethylene glycol 2000 in mRNA vaccines has led to concern that this component could be implicated in anaphylaxis.⁶

COVID-19 antigens can give rise to varying clinical manifestations that are directly related to viral tissue damage or are indirectly induced by the antiviral immune response.^13,14 Hyperactivation of the immune system to eradicate COVID-19 may trigger autoimmunity; several immune-mediated disorders have been described in individuals infected with SARS-CoV-2. Dermal manifestations include cutaneous rash and vasculitis.^13-16 Crucial immunologic steps occur during SARS-CoV-2 infection that may link autoimmunity to COVID-19.^13,14 In preliminary published data on the efficacy of the Moderna vaccine on 45 trial enrollees, 3 did not receive the second dose of vaccination, including 1 who developed urticaria on both legs 5 days after the first dose.¹

Introduction of viral RNA can induce autoimmunity that can be explained by various phenomena, including epitope spreading, molecular mimicry, cryptic antigen, and bystander activation. Remarkably, more than one-third of immunogenic proteins in SARS-CoV-2 have potentially problematic homology to proteins that are key to the human adaptive immune system.⁵

Moreover, SARS-CoV-2 seems to induce organ injury through alternative mechanisms beyond direct viral infection, including immunologic injury. In some situations, hyperactivation of the immune response to SARS-CoV-2 RNA can result in autoimmune disease. COVID-19 has been associated with immune-mediated systemic or organ-selective manifestations, some of which fulfill the diagnostic or classification criteria of specific autoimmune diseases. It is unclear whether those medical disorders are the result of transitory postinfectious epiphenomena.⁵

A few studies have shown that patients with rheumatic disease have an incidence and prevalence of COVID-19 that is similar to the general population. A similar pattern has been detected in COVID-19 morbidity and mortality rates, even among patients with an autoimmune disease, such as rheumatoid arthritis and Sjögren syndrome.^5,17 Furthermore, exacerbation of preexisting rheumatic symptoms may be due to hyperactivation of antiviral pathways in a person with an autoimmune disease.^17-19 The findings in our patient suggested a direct role for the vaccine in skin manifestations, rather than for reactivation or development of new systemic autoimmune processes, such as systemic lupus erythematosus.

Exacerbation of psoriasis following COVID-19 vaccination has been described²⁰; however, the case patient did not have a history of psoriasis. The mechanism(s) of such exacerbation remain unclear; COVID-19 vaccine–induced helper T cells (T_H17) may play a role.²¹ Other skin manifestations encountered following COVID-19 vaccination include lichen planus, leukocytoclastic vasculitic rash, erythema multiforme–like rash, and pityriasis rosea–like rash.^22-25 The immune mechanisms of these manifestations remain unclear.

The clinical presentation of delayed vaccination reactions can be attributed to the timing of symptoms and, in this case, the immune-mediated background of a psoriasiform reaction. Although adverse reactions to the SARS-CoV-2 mRNA vaccine are rare, more individuals should be studied after vaccination to confirm and better understand this phenomenon.

To the Editor:

The Moderna COVID-19 messenger RNA (mRNA) vaccine was authorized for use on December 18, 2020, with the second dose beginning on January 15, 2021.^1-3 Some individuals who received the Moderna vaccine experienced an intense rash known as “COVID arm,” a harmless but bothersome adverse effect that typically appears within a week and is a localized and transient immunogenic response.⁴ COVID arm differs from most vaccine adverse effects. The rash emerges not immediately but 5 to 9 days after the initial dose—on average, 1 week later. Apart from being itchy, the rash does not appear to be harmful and is not a reason to hesitate getting vaccinated.

Dermatologists and allergists have been studying this adverse effect, which has been formally termed delayed cutaneous hypersensitivity. Of potential clinical consequence is that the efficacy of the mRNA COVID-19 vaccine may be harmed if postvaccination dermal reactions necessitate systemic corticosteroid therapy. Because this vaccine stimulates an immune response as viral RNA integrates in cells secondary to production of the spike protein of the virus, the skin may be affected secondarily and manifestations of any underlying disease may be aggravated.⁵ We report a patient who developed a psoriasiform dermatitis after the first dose of the Moderna vaccine.

A 65-year-old woman presented to her primary care physician because of the severity of psoriasiform dermatitis that developed 5 days after she received the first dose of the Moderna COVID-19 mRNA vaccine. The patient had a medical history of Sjögren syndrome. Her medication history was negative, and her family history was negative for autoimmune disease. Physical examination by primary care revealed an erythematous scaly rash with plaques and papules on the neck and back (Figure 1). The patient presented again to primary care 2 days later with swollen, painful, discolored digits (Figure 2) and a stiff, sore neck.

Laboratory results were positive for anti–Sjögren syndrome–related antigens A and B. A complete blood cell count; comprehensive metabolic panel; erythrocyte sedimentation rate; and assays of rheumatoid factor, C-reactive protein, and anti–cyclic citrullinated peptide were within reference range. A biopsy of a lesion on the back showed psoriasiform dermatitis with confluent parakeratosis and scattered necrotic keratinocytes. There was superficial perivascular inflammation with rare eosinophils (Figure 3).

The patient was treated with a course of systemic corticosteroids. The rash resolved in 1 week. She did not receive the second dose due to the rash.

Two mRNA COVID-19 vaccines—Pfizer BioNTech and Moderna—have been granted emergency use authorization by the US Food and Drug Administration.⁶ The safety profile of the mRNA-1273 vaccine for the median 2-month follow-up showed no safety concerns.³ Minor localized adverse effects (eg, pain, redness, swelling) have been observed more frequently with the vaccines than with placebo. Systemic symptoms, such as fever, fatigue, headache, and muscle and joint pain, also were seen somewhat more often with the vaccines than with placebo; most such effects occurred 24 to 48 hours after vaccination.^3,6,7 The frequency of unsolicited adverse events and serious adverse events reported during the 28-day period after vaccination generally was similar among participants in the vaccine and placebo groups.³

There are 2 types of reactions to COVID-19 vaccination: immediate and delayed. Immediate reactions usually are due to anaphylaxis, requiring prompt recognition and treatment with epinephrine to stop rapid progression of life-threatening symptoms. Delayed reactions include localized reactions, such as urticaria and benign exanthema; serum sickness and serum sickness–like reactions; fever; and rare skin, organ, and neurologic sequelae.^1,6-8

Cutaneous manifestations, present in 16% to 50% of patients with Sjögren syndrome, are considered one of the most common extraglandular presentations of the syndrome. They are classified as nonvascular (eg, xerosis, angular cheilitis, eyelid dermatitis, annular erythema) and vascular (eg, Raynaud phenomenon, vasculitis).^9-11 Our patient did not have any of those findings. She had not taken any medications before the rash appeared, thereby ruling out a drug reaction.

The differential for our patient included post–urinary tract infection immune-reactive arthritis and rash, which is not typical with Escherichia coli infection but is described with infection with Chlamydia species and Salmonella species. Moreover, post–urinary tract infection immune-reactive arthritis and rash appear mostly on the palms and soles. Systemic lupus erythematosus–like rashes have a different histology and appear on sun-exposed areas; our patient’s rash was found mainly on unexposed areas.¹²

Because our patient received the Moderna vaccine 5 days before the rash appeared and later developed swelling of the digits with morning stiffness, a delayed serum sickness–like reaction secondary to COVID-19 vaccination was possible.^3,6

COVID-19 mRNA vaccines developed by Pfizer-BioNTech and Moderna incorporate a lipid-based nanoparticle carrier system that prevents rapid enzymatic degradation of mRNA and facilitates in vivo delivery of mRNA. This lipid-based nanoparticle carrier system is further stabilized by a polyethylene glycol 2000 lipid conjugate that provides a hydrophilic layer, thus prolonging half-life. The presence of lipid polyethylene glycol 2000 in mRNA vaccines has led to concern that this component could be implicated in anaphylaxis.⁶

COVID-19 antigens can give rise to varying clinical manifestations that are directly related to viral tissue damage or are indirectly induced by the antiviral immune response.^13,14 Hyperactivation of the immune system to eradicate COVID-19 may trigger autoimmunity; several immune-mediated disorders have been described in individuals infected with SARS-CoV-2. Dermal manifestations include cutaneous rash and vasculitis.^13-16 Crucial immunologic steps occur during SARS-CoV-2 infection that may link autoimmunity to COVID-19.^13,14 In preliminary published data on the efficacy of the Moderna vaccine on 45 trial enrollees, 3 did not receive the second dose of vaccination, including 1 who developed urticaria on both legs 5 days after the first dose.¹

Introduction of viral RNA can induce autoimmunity that can be explained by various phenomena, including epitope spreading, molecular mimicry, cryptic antigen, and bystander activation. Remarkably, more than one-third of immunogenic proteins in SARS-CoV-2 have potentially problematic homology to proteins that are key to the human adaptive immune system.⁵

Moreover, SARS-CoV-2 seems to induce organ injury through alternative mechanisms beyond direct viral infection, including immunologic injury. In some situations, hyperactivation of the immune response to SARS-CoV-2 RNA can result in autoimmune disease. COVID-19 has been associated with immune-mediated systemic or organ-selective manifestations, some of which fulfill the diagnostic or classification criteria of specific autoimmune diseases. It is unclear whether those medical disorders are the result of transitory postinfectious epiphenomena.⁵

A few studies have shown that patients with rheumatic disease have an incidence and prevalence of COVID-19 that is similar to the general population. A similar pattern has been detected in COVID-19 morbidity and mortality rates, even among patients with an autoimmune disease, such as rheumatoid arthritis and Sjögren syndrome.^5,17 Furthermore, exacerbation of preexisting rheumatic symptoms may be due to hyperactivation of antiviral pathways in a person with an autoimmune disease.^17-19 The findings in our patient suggested a direct role for the vaccine in skin manifestations, rather than for reactivation or development of new systemic autoimmune processes, such as systemic lupus erythematosus.

Exacerbation of psoriasis following COVID-19 vaccination has been described²⁰; however, the case patient did not have a history of psoriasis. The mechanism(s) of such exacerbation remain unclear; COVID-19 vaccine–induced helper T cells (T_H17) may play a role.²¹ Other skin manifestations encountered following COVID-19 vaccination include lichen planus, leukocytoclastic vasculitic rash, erythema multiforme–like rash, and pityriasis rosea–like rash.^22-25 The immune mechanisms of these manifestations remain unclear.

The clinical presentation of delayed vaccination reactions can be attributed to the timing of symptoms and, in this case, the immune-mediated background of a psoriasiform reaction. Although adverse reactions to the SARS-CoV-2 mRNA vaccine are rare, more individuals should be studied after vaccination to confirm and better understand this phenomenon.

The incidence of new COVID-19 cases in children seems to have stabilized as the national count remained under 30,000 for the fifth consecutive week, but hospitalization data may indicate some possible turbulence.

Just over 28,000 pediatric cases were reported during the week of Nov. 4-10, a drop of 5.4% from the previous week, the American Academy of Pediatrics and the Children’s Hospital Association said in their weekly COVID-19 report involving data from state and territorial health departments, several of which are no longer updating their websites.

The stability in weekly cases, however, comes in contrast to a very recent and considerable increase in new hospital admissions of children aged 0-17 years with confirmed COVID-19. That rate, which was 0.18 hospitalizations per 100,000 population on Nov. 7 and 0.19 per 100,000 on Nov. 8 and 9, jumped all the way to 0.34 on Nov. 10 and 0.48 on Nov. 11, according to data from the Centers for Disease Control and Prevention. That is the highest rate since the closing days of the Omicron surge in February.

The rate for Nov. 12, the most recent one available, was down slightly to 0.47 admissions per 100,000. There doesn’t seem to be any evidence in the CDC’s data of a similar sudden increase in new hospitalizations among any other age group, and no age group, including children, shows any sign of a recent increase in emergency department visits with diagnosed COVID. (The CDC has not yet responded to our inquiry about this development.)

Centers for Disease Control and Prevention

The two most recent 7-day averages for new admissions in children aged 0-17 show a small increase, but they cover the periods of Oct. 15 to Oct. 31, when there were 126 admissions per day, and Nov. 1 to Nov. 7, when the average went up to 133 per day, the CDC said on its COVID Data Tracker.

The CDC does not publish a weekly count of new COVID cases, but its latest data on the rate of incident cases seem to agree with the AAP/CHA figures: A gradual decline in all age groups, including children, since the beginning of September.

Vaccinations, on the other hand, bucked their recent trend and increased in the last week. About 43,000 children under age 5 years received their initial dose of COVID vaccine during Nov. 3-9, compared with 30,000 and 33,000 the 2 previous weeks, while 5- to 11-year-olds hit their highest weekly mark (31,000) since late August and 12- to 17-year-olds had their biggest week (27,000) since mid-August, the AAP reported based on CDC data.


 

The incidence of new COVID-19 cases in children seems to have stabilized as the national count remained under 30,000 for the fifth consecutive week, but hospitalization data may indicate some possible turbulence.

Just over 28,000 pediatric cases were reported during the week of Nov. 4-10, a drop of 5.4% from the previous week, the American Academy of Pediatrics and the Children’s Hospital Association said in their weekly COVID-19 report involving data from state and territorial health departments, several of which are no longer updating their websites.

The stability in weekly cases, however, comes in contrast to a very recent and considerable increase in new hospital admissions of children aged 0-17 years with confirmed COVID-19. That rate, which was 0.18 hospitalizations per 100,000 population on Nov. 7 and 0.19 per 100,000 on Nov. 8 and 9, jumped all the way to 0.34 on Nov. 10 and 0.48 on Nov. 11, according to data from the Centers for Disease Control and Prevention. That is the highest rate since the closing days of the Omicron surge in February.

The rate for Nov. 12, the most recent one available, was down slightly to 0.47 admissions per 100,000. There doesn’t seem to be any evidence in the CDC’s data of a similar sudden increase in new hospitalizations among any other age group, and no age group, including children, shows any sign of a recent increase in emergency department visits with diagnosed COVID. (The CDC has not yet responded to our inquiry about this development.)

Centers for Disease Control and Prevention

The two most recent 7-day averages for new admissions in children aged 0-17 show a small increase, but they cover the periods of Oct. 15 to Oct. 31, when there were 126 admissions per day, and Nov. 1 to Nov. 7, when the average went up to 133 per day, the CDC said on its COVID Data Tracker.

The CDC does not publish a weekly count of new COVID cases, but its latest data on the rate of incident cases seem to agree with the AAP/CHA figures: A gradual decline in all age groups, including children, since the beginning of September.

Vaccinations, on the other hand, bucked their recent trend and increased in the last week. About 43,000 children under age 5 years received their initial dose of COVID vaccine during Nov. 3-9, compared with 30,000 and 33,000 the 2 previous weeks, while 5- to 11-year-olds hit their highest weekly mark (31,000) since late August and 12- to 17-year-olds had their biggest week (27,000) since mid-August, the AAP reported based on CDC data.


 

The incidence of new COVID-19 cases in children seems to have stabilized as the national count remained under 30,000 for the fifth consecutive week, but hospitalization data may indicate some possible turbulence.

Just over 28,000 pediatric cases were reported during the week of Nov. 4-10, a drop of 5.4% from the previous week, the American Academy of Pediatrics and the Children’s Hospital Association said in their weekly COVID-19 report involving data from state and territorial health departments, several of which are no longer updating their websites.

The stability in weekly cases, however, comes in contrast to a very recent and considerable increase in new hospital admissions of children aged 0-17 years with confirmed COVID-19. That rate, which was 0.18 hospitalizations per 100,000 population on Nov. 7 and 0.19 per 100,000 on Nov. 8 and 9, jumped all the way to 0.34 on Nov. 10 and 0.48 on Nov. 11, according to data from the Centers for Disease Control and Prevention. That is the highest rate since the closing days of the Omicron surge in February.

The rate for Nov. 12, the most recent one available, was down slightly to 0.47 admissions per 100,000. There doesn’t seem to be any evidence in the CDC’s data of a similar sudden increase in new hospitalizations among any other age group, and no age group, including children, shows any sign of a recent increase in emergency department visits with diagnosed COVID. (The CDC has not yet responded to our inquiry about this development.)

Centers for Disease Control and Prevention

The two most recent 7-day averages for new admissions in children aged 0-17 show a small increase, but they cover the periods of Oct. 15 to Oct. 31, when there were 126 admissions per day, and Nov. 1 to Nov. 7, when the average went up to 133 per day, the CDC said on its COVID Data Tracker.

The CDC does not publish a weekly count of new COVID cases, but its latest data on the rate of incident cases seem to agree with the AAP/CHA figures: A gradual decline in all age groups, including children, since the beginning of September.

Vaccinations, on the other hand, bucked their recent trend and increased in the last week. About 43,000 children under age 5 years received their initial dose of COVID vaccine during Nov. 3-9, compared with 30,000 and 33,000 the 2 previous weeks, while 5- to 11-year-olds hit their highest weekly mark (31,000) since late August and 12- to 17-year-olds had their biggest week (27,000) since mid-August, the AAP reported based on CDC data.