Immunology

Almost 36% of students and faculty at George Washington University with a history of COVID-19 reported symptoms consistent with long COVID in a new study.

With a median age of 23 years, the study is unique for evaluating mostly healthy, young adults and for its rare look at long COVID in a university community. 

The more symptoms during a bout with COVID, the greater the risk for long COVID, the researchers found. That lines up with previous studies. Also, the more vaccinations and booster shots against SARS-CoV-2, the virus that causes COVID, the lower the long COVID risk.

Women were more likely than men to be affected. Current or prior smoking, seeking medical care for COVID, and receiving antibody treatment also were linked to higher chances for developing long COVID. 

Lead author Megan Landry, DrPH, MPH, and colleagues were already assessing students, staff, and faculty at George Washington University, Washington, who tested positive for COVID. Then they started seeing symptoms that lasted 28 days or more after their 10-day isolation period. 

“We were starting to recognize that individuals ... were still having symptoms longer than the typical isolation period,” said Dr. Landry. So they developed a questionnaire to figure out the how long these symptoms last and how many people are affected by them. 

The list of potential symptoms was long and included trouble thinking, fatigue, loss of smell or taste, shortness of breath, and more. 

The study was published online in Emerging Infectious Diseases. Results are based on records and responses from 1,388 students, faculty, and staff from July 2021 to March 2022.

People had a median of four long COVID symptoms, about 63% were women, and 56% were non-Hispanic White. About three-quarters were students and the remainder were faculty and staff. 

The finding that 36% of people with a history of COVID reported long COVID symptoms did not surprise Dr. Landry.

“Based on the literature that’s currently out there, it ranges from a 10% to an 80% prevalence of long COVID,” she said. “We kind of figured that we would fall somewhere in there.”

In contrast, that figure seemed high to Eric Topol, MD.

“That’s really high,” said Dr. Topol, founder and director of the Scripps Research Translational Institute in La Jolla, Calif. He added most studies estimate that about 10% of people with a history of acute infection develop long COVID. 

Even at 10%, which could be an underestimate, that’s a lot of affected people globally. 

“At least 65 million individuals around the world have long COVID, based on a conservative estimated incidence of 10% of infected people and more than 651 million documented COVID-19 cases worldwide; the number is likely much higher due to many undocumented cases,” Dr. Topol and colleagues wrote in a long COVID review article published in Nature Reviews Microbiology.

Research continues

“Long COVID is still evolving and we continue to learn more about it every day,” Landry said. “It’s just so new and there are still a lot of unknowns. That’s why it’s important to get this information out.” 

People with long COVID often have a hard time with occupational, educational, social, or personal activities, compared with before COVID, with effects that can last for more than 6 months, the authors noted. 

“I think across the board, universities in general need to consider the possibility of folks on their campuses are having symptoms of long COVID,” Dr. Landry said.

Moving forward, Dr. Landry and colleagues would like to continue investigating long COVID. For example, in the current study, they did not ask about severity of symptoms or how the symptoms affected daily functioning. 

“I would like to continue this and dive deeper into how disruptive their symptoms of long COVID are to their everyday studying, teaching, or their activities to keeping a university running,” Dr. Landry said.

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

Almost 36% of students and faculty at George Washington University with a history of COVID-19 reported symptoms consistent with long COVID in a new study.

With a median age of 23 years, the study is unique for evaluating mostly healthy, young adults and for its rare look at long COVID in a university community. 

The more symptoms during a bout with COVID, the greater the risk for long COVID, the researchers found. That lines up with previous studies. Also, the more vaccinations and booster shots against SARS-CoV-2, the virus that causes COVID, the lower the long COVID risk.

Women were more likely than men to be affected. Current or prior smoking, seeking medical care for COVID, and receiving antibody treatment also were linked to higher chances for developing long COVID. 

Lead author Megan Landry, DrPH, MPH, and colleagues were already assessing students, staff, and faculty at George Washington University, Washington, who tested positive for COVID. Then they started seeing symptoms that lasted 28 days or more after their 10-day isolation period. 

“We were starting to recognize that individuals ... were still having symptoms longer than the typical isolation period,” said Dr. Landry. So they developed a questionnaire to figure out the how long these symptoms last and how many people are affected by them. 

The list of potential symptoms was long and included trouble thinking, fatigue, loss of smell or taste, shortness of breath, and more. 

The study was published online in Emerging Infectious Diseases. Results are based on records and responses from 1,388 students, faculty, and staff from July 2021 to March 2022.

People had a median of four long COVID symptoms, about 63% were women, and 56% were non-Hispanic White. About three-quarters were students and the remainder were faculty and staff. 

The finding that 36% of people with a history of COVID reported long COVID symptoms did not surprise Dr. Landry.

“Based on the literature that’s currently out there, it ranges from a 10% to an 80% prevalence of long COVID,” she said. “We kind of figured that we would fall somewhere in there.”

In contrast, that figure seemed high to Eric Topol, MD.

“That’s really high,” said Dr. Topol, founder and director of the Scripps Research Translational Institute in La Jolla, Calif. He added most studies estimate that about 10% of people with a history of acute infection develop long COVID. 

Even at 10%, which could be an underestimate, that’s a lot of affected people globally. 

“At least 65 million individuals around the world have long COVID, based on a conservative estimated incidence of 10% of infected people and more than 651 million documented COVID-19 cases worldwide; the number is likely much higher due to many undocumented cases,” Dr. Topol and colleagues wrote in a long COVID review article published in Nature Reviews Microbiology.

Research continues

“Long COVID is still evolving and we continue to learn more about it every day,” Landry said. “It’s just so new and there are still a lot of unknowns. That’s why it’s important to get this information out.” 

People with long COVID often have a hard time with occupational, educational, social, or personal activities, compared with before COVID, with effects that can last for more than 6 months, the authors noted. 

“I think across the board, universities in general need to consider the possibility of folks on their campuses are having symptoms of long COVID,” Dr. Landry said.

Moving forward, Dr. Landry and colleagues would like to continue investigating long COVID. For example, in the current study, they did not ask about severity of symptoms or how the symptoms affected daily functioning. 

“I would like to continue this and dive deeper into how disruptive their symptoms of long COVID are to their everyday studying, teaching, or their activities to keeping a university running,” Dr. Landry said.

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

Almost 36% of students and faculty at George Washington University with a history of COVID-19 reported symptoms consistent with long COVID in a new study.

With a median age of 23 years, the study is unique for evaluating mostly healthy, young adults and for its rare look at long COVID in a university community. 

The more symptoms during a bout with COVID, the greater the risk for long COVID, the researchers found. That lines up with previous studies. Also, the more vaccinations and booster shots against SARS-CoV-2, the virus that causes COVID, the lower the long COVID risk.

Women were more likely than men to be affected. Current or prior smoking, seeking medical care for COVID, and receiving antibody treatment also were linked to higher chances for developing long COVID. 

Lead author Megan Landry, DrPH, MPH, and colleagues were already assessing students, staff, and faculty at George Washington University, Washington, who tested positive for COVID. Then they started seeing symptoms that lasted 28 days or more after their 10-day isolation period. 

“We were starting to recognize that individuals ... were still having symptoms longer than the typical isolation period,” said Dr. Landry. So they developed a questionnaire to figure out the how long these symptoms last and how many people are affected by them. 

The list of potential symptoms was long and included trouble thinking, fatigue, loss of smell or taste, shortness of breath, and more. 

The study was published online in Emerging Infectious Diseases. Results are based on records and responses from 1,388 students, faculty, and staff from July 2021 to March 2022.

People had a median of four long COVID symptoms, about 63% were women, and 56% were non-Hispanic White. About three-quarters were students and the remainder were faculty and staff. 

The finding that 36% of people with a history of COVID reported long COVID symptoms did not surprise Dr. Landry.

“Based on the literature that’s currently out there, it ranges from a 10% to an 80% prevalence of long COVID,” she said. “We kind of figured that we would fall somewhere in there.”

In contrast, that figure seemed high to Eric Topol, MD.

“That’s really high,” said Dr. Topol, founder and director of the Scripps Research Translational Institute in La Jolla, Calif. He added most studies estimate that about 10% of people with a history of acute infection develop long COVID. 

Even at 10%, which could be an underestimate, that’s a lot of affected people globally. 

“At least 65 million individuals around the world have long COVID, based on a conservative estimated incidence of 10% of infected people and more than 651 million documented COVID-19 cases worldwide; the number is likely much higher due to many undocumented cases,” Dr. Topol and colleagues wrote in a long COVID review article published in Nature Reviews Microbiology.

Research continues

“Long COVID is still evolving and we continue to learn more about it every day,” Landry said. “It’s just so new and there are still a lot of unknowns. That’s why it’s important to get this information out.” 

People with long COVID often have a hard time with occupational, educational, social, or personal activities, compared with before COVID, with effects that can last for more than 6 months, the authors noted. 

“I think across the board, universities in general need to consider the possibility of folks on their campuses are having symptoms of long COVID,” Dr. Landry said.

Moving forward, Dr. Landry and colleagues would like to continue investigating long COVID. For example, in the current study, they did not ask about severity of symptoms or how the symptoms affected daily functioning. 

“I would like to continue this and dive deeper into how disruptive their symptoms of long COVID are to their everyday studying, teaching, or their activities to keeping a university running,” Dr. Landry said.

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

U.S. health officials want to simplify the recommended COVID-19 vaccine protocol, making it more like the process for annual flu shots.

The U.S. Food and Drug Administration is suggesting a single annual shot. The formulation would be selected in June targeting the most threatening COVID-19 strains, and then people could get a shot in the fall when people begin spending more time indoors and exposure increases. 

Some people, such as those who are older or immunocompromised, may need more than one dose.

A national advisory committee is expected to vote on the proposal at a meeting Jan. 26.

People in the United States have been much less likely to get an updated COVID-19 booster shot, compared with widespread uptake of the primary vaccine series. In its proposal, the FDA indicated it hoped a single annual shot would overcome challenges created by the complexity of the process – both in messaging and administration – attributed to that low booster rate. Nine in 10 people age 12 or older got the primary vaccine series in the United States, but only 15% got the latest booster shot for COVID-19.

About half of children and adults in the U.S. get an annual flu shot, according to Centers for Disease Control and Prevention data.

The FDA also wants to move to a single COVID-19 vaccine formulation that would be used for primary vaccine series and for booster shots.

COVID-19 cases, hospitalizations, and deaths are trending downward, according to the data tracker from the New York Times. Cases are down 28%, with 47,290 tallied daily. Hospitalizations are down 22%, with 37,474 daily. Deaths are down 4%, with an average of 489 per day as of Jan. 22.

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

U.S. health officials want to simplify the recommended COVID-19 vaccine protocol, making it more like the process for annual flu shots.

The U.S. Food and Drug Administration is suggesting a single annual shot. The formulation would be selected in June targeting the most threatening COVID-19 strains, and then people could get a shot in the fall when people begin spending more time indoors and exposure increases. 

Some people, such as those who are older or immunocompromised, may need more than one dose.

A national advisory committee is expected to vote on the proposal at a meeting Jan. 26.

People in the United States have been much less likely to get an updated COVID-19 booster shot, compared with widespread uptake of the primary vaccine series. In its proposal, the FDA indicated it hoped a single annual shot would overcome challenges created by the complexity of the process – both in messaging and administration – attributed to that low booster rate. Nine in 10 people age 12 or older got the primary vaccine series in the United States, but only 15% got the latest booster shot for COVID-19.

About half of children and adults in the U.S. get an annual flu shot, according to Centers for Disease Control and Prevention data.

The FDA also wants to move to a single COVID-19 vaccine formulation that would be used for primary vaccine series and for booster shots.

COVID-19 cases, hospitalizations, and deaths are trending downward, according to the data tracker from the New York Times. Cases are down 28%, with 47,290 tallied daily. Hospitalizations are down 22%, with 37,474 daily. Deaths are down 4%, with an average of 489 per day as of Jan. 22.

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

U.S. health officials want to simplify the recommended COVID-19 vaccine protocol, making it more like the process for annual flu shots.

The U.S. Food and Drug Administration is suggesting a single annual shot. The formulation would be selected in June targeting the most threatening COVID-19 strains, and then people could get a shot in the fall when people begin spending more time indoors and exposure increases. 

Some people, such as those who are older or immunocompromised, may need more than one dose.

A national advisory committee is expected to vote on the proposal at a meeting Jan. 26.

People in the United States have been much less likely to get an updated COVID-19 booster shot, compared with widespread uptake of the primary vaccine series. In its proposal, the FDA indicated it hoped a single annual shot would overcome challenges created by the complexity of the process – both in messaging and administration – attributed to that low booster rate. Nine in 10 people age 12 or older got the primary vaccine series in the United States, but only 15% got the latest booster shot for COVID-19.

About half of children and adults in the U.S. get an annual flu shot, according to Centers for Disease Control and Prevention data.

The FDA also wants to move to a single COVID-19 vaccine formulation that would be used for primary vaccine series and for booster shots.

COVID-19 cases, hospitalizations, and deaths are trending downward, according to the data tracker from the New York Times. Cases are down 28%, with 47,290 tallied daily. Hospitalizations are down 22%, with 37,474 daily. Deaths are down 4%, with an average of 489 per day as of Jan. 22.

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

The only HIV vaccine nearing the completion of testing trials is not effective at preventing HIV, officials announced Wednesday.

The vaccine had been in development since 2019 and was given to 3,900 study participants through October 2022, but data shows it does not protect against HIV compared with a placebo, according to developer Janssen Pharmaceutical.

Experts estimate the failure means there won’t be another potential vaccine on the horizon for 3 to 5 years, the New York Times reported.

“It’s obviously disappointing,” Anthony Fauci, MD, former head of the National Institute of Allergy and Infectious Diseases, told MSNBC, noting that other areas of HIV treatment research are promising. “I don’t think that people should give up on the field of the HIV vaccine.”

No safety issues had been identified with the vaccine during the trial, which studied the experimental treatment in men who have sex with men or with transgender people.

There is no cure for HIV, but disease progression can be managed with existing treatments. HIV attacks the body’s immune system and destroys white blood cells, increasing the risk of other infections. More than 1.5 million people worldwide were infected with HIV in 2021 and 38.4 million people are living with the virus, according to UNAIDS.

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

The only HIV vaccine nearing the completion of testing trials is not effective at preventing HIV, officials announced Wednesday.

The vaccine had been in development since 2019 and was given to 3,900 study participants through October 2022, but data shows it does not protect against HIV compared with a placebo, according to developer Janssen Pharmaceutical.

Experts estimate the failure means there won’t be another potential vaccine on the horizon for 3 to 5 years, the New York Times reported.

“It’s obviously disappointing,” Anthony Fauci, MD, former head of the National Institute of Allergy and Infectious Diseases, told MSNBC, noting that other areas of HIV treatment research are promising. “I don’t think that people should give up on the field of the HIV vaccine.”

No safety issues had been identified with the vaccine during the trial, which studied the experimental treatment in men who have sex with men or with transgender people.

There is no cure for HIV, but disease progression can be managed with existing treatments. HIV attacks the body’s immune system and destroys white blood cells, increasing the risk of other infections. More than 1.5 million people worldwide were infected with HIV in 2021 and 38.4 million people are living with the virus, according to UNAIDS.

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

The only HIV vaccine nearing the completion of testing trials is not effective at preventing HIV, officials announced Wednesday.

The vaccine had been in development since 2019 and was given to 3,900 study participants through October 2022, but data shows it does not protect against HIV compared with a placebo, according to developer Janssen Pharmaceutical.

Experts estimate the failure means there won’t be another potential vaccine on the horizon for 3 to 5 years, the New York Times reported.

“It’s obviously disappointing,” Anthony Fauci, MD, former head of the National Institute of Allergy and Infectious Diseases, told MSNBC, noting that other areas of HIV treatment research are promising. “I don’t think that people should give up on the field of the HIV vaccine.”

No safety issues had been identified with the vaccine during the trial, which studied the experimental treatment in men who have sex with men or with transgender people.

There is no cure for HIV, but disease progression can be managed with existing treatments. HIV attacks the body’s immune system and destroys white blood cells, increasing the risk of other infections. More than 1.5 million people worldwide were infected with HIV in 2021 and 38.4 million people are living with the virus, according to UNAIDS.

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

Two years ago, when the first COVID-19 vaccines were administered, marked a game-changing moment in the fight against the pandemic. But it also was a significant moment for messenger RNA (mRNA) technology, which up until then had shown promise but had never quite broken through. 

Now, scientists hope to use this technology to develop more vaccines, with those at the University of Pennsylvania hoping to use that technology to pioneer yet another first: a universal flu vaccine that can protect us against all flu types, not just a select few. 

It’s the latest advance in a new age of vaccinology, where vaccines are easier and faster to produce, as well as more flexible and customizable. 

“It’s all about covering the different flavors of flu in a way the current vaccines cannot do,” says Ofer Levy, MD, PhD, director of the Precision Vaccines Program at Boston Children’s Hospital, who is not involved with the UPenn research. “The mRNA platform is attractive here given its scalability and modularity, where you can mix and match different mRNAs.” 

A recent paper, published in Science, reports successful animal tests of the experimental vaccine, which, like the Pfizer-BioNTech and Moderna COVID vaccines, relies on mRNA. But the idea is not to replace the annual flu shot. It’s to develop a primer that could be administered in childhood, readying the body’s B cells and T cells to react quickly if faced with a flu virus. 

It’s all part of a National Institutes of Health–funded effort to develop a universal flu vaccine, with hopes of heading off future flu pandemics. Annual shots protect against flu subtypes known to spread in humans. But many subtypes circulate in animals, like birds and pigs, and occasionally jump to humans, causing pandemics. 

“The current vaccines provide very little protection against these other subtypes,” says lead study author Scott Hensley, PhD, a professor of microbiology at UPenn. “We set out to make a vaccine that would provide some level of immunity against essentially every influenza subtype we know about.” 

That’s 20 subtypes altogether. The unique properties of mRNA vaccines make immune responses against all those antigens possible, Dr. Hensley says. 

Old-school vaccines introduce a weakened or dead bacteria or virus into the body, but mRNA vaccines use mRNA encoded with a protein from the virus. That’s the “spike” protein for COVID, and for the experimental vaccine, it’s hemagglutinin, the major protein found on the surface of all flu viruses.

Mice and ferrets that had never been exposed to the flu were given the vaccine and produced high levels of antibodies against all 20 flu subtypes. Vaccinated mice exposed to the exact strains in the vaccine stayed pretty healthy, while those exposed to strains not found in the vaccine got sick but recovered quickly and survived. Unvaccinated mice exposed to the flu strain died. 

The vaccine seems to be able to “induce broad immunity against all the different influenza subtypes,” Dr. Hensley says, preventing severe illness if not infection overall. 

Still, whether it could truly stave off a pandemic that hasn’t happened yet is hard to say, Dr. Levy cautions. 

“We are going to need to better learn the molecular rules by which these vaccines protect,” he says.

But the UPenn team is forging ahead, with plans to test their vaccine in human adults in 2023 to determine safety, dosing, and antibody response.

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

Two years ago, when the first COVID-19 vaccines were administered, marked a game-changing moment in the fight against the pandemic. But it also was a significant moment for messenger RNA (mRNA) technology, which up until then had shown promise but had never quite broken through. 

Now, scientists hope to use this technology to develop more vaccines, with those at the University of Pennsylvania hoping to use that technology to pioneer yet another first: a universal flu vaccine that can protect us against all flu types, not just a select few. 

It’s the latest advance in a new age of vaccinology, where vaccines are easier and faster to produce, as well as more flexible and customizable. 

“It’s all about covering the different flavors of flu in a way the current vaccines cannot do,” says Ofer Levy, MD, PhD, director of the Precision Vaccines Program at Boston Children’s Hospital, who is not involved with the UPenn research. “The mRNA platform is attractive here given its scalability and modularity, where you can mix and match different mRNAs.” 

A recent paper, published in Science, reports successful animal tests of the experimental vaccine, which, like the Pfizer-BioNTech and Moderna COVID vaccines, relies on mRNA. But the idea is not to replace the annual flu shot. It’s to develop a primer that could be administered in childhood, readying the body’s B cells and T cells to react quickly if faced with a flu virus. 

It’s all part of a National Institutes of Health–funded effort to develop a universal flu vaccine, with hopes of heading off future flu pandemics. Annual shots protect against flu subtypes known to spread in humans. But many subtypes circulate in animals, like birds and pigs, and occasionally jump to humans, causing pandemics. 

“The current vaccines provide very little protection against these other subtypes,” says lead study author Scott Hensley, PhD, a professor of microbiology at UPenn. “We set out to make a vaccine that would provide some level of immunity against essentially every influenza subtype we know about.” 

That’s 20 subtypes altogether. The unique properties of mRNA vaccines make immune responses against all those antigens possible, Dr. Hensley says. 

Old-school vaccines introduce a weakened or dead bacteria or virus into the body, but mRNA vaccines use mRNA encoded with a protein from the virus. That’s the “spike” protein for COVID, and for the experimental vaccine, it’s hemagglutinin, the major protein found on the surface of all flu viruses.

Mice and ferrets that had never been exposed to the flu were given the vaccine and produced high levels of antibodies against all 20 flu subtypes. Vaccinated mice exposed to the exact strains in the vaccine stayed pretty healthy, while those exposed to strains not found in the vaccine got sick but recovered quickly and survived. Unvaccinated mice exposed to the flu strain died. 

The vaccine seems to be able to “induce broad immunity against all the different influenza subtypes,” Dr. Hensley says, preventing severe illness if not infection overall. 

Still, whether it could truly stave off a pandemic that hasn’t happened yet is hard to say, Dr. Levy cautions. 

“We are going to need to better learn the molecular rules by which these vaccines protect,” he says.

But the UPenn team is forging ahead, with plans to test their vaccine in human adults in 2023 to determine safety, dosing, and antibody response.

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

Two years ago, when the first COVID-19 vaccines were administered, marked a game-changing moment in the fight against the pandemic. But it also was a significant moment for messenger RNA (mRNA) technology, which up until then had shown promise but had never quite broken through. 

Now, scientists hope to use this technology to develop more vaccines, with those at the University of Pennsylvania hoping to use that technology to pioneer yet another first: a universal flu vaccine that can protect us against all flu types, not just a select few. 

It’s the latest advance in a new age of vaccinology, where vaccines are easier and faster to produce, as well as more flexible and customizable. 

“It’s all about covering the different flavors of flu in a way the current vaccines cannot do,” says Ofer Levy, MD, PhD, director of the Precision Vaccines Program at Boston Children’s Hospital, who is not involved with the UPenn research. “The mRNA platform is attractive here given its scalability and modularity, where you can mix and match different mRNAs.” 

A recent paper, published in Science, reports successful animal tests of the experimental vaccine, which, like the Pfizer-BioNTech and Moderna COVID vaccines, relies on mRNA. But the idea is not to replace the annual flu shot. It’s to develop a primer that could be administered in childhood, readying the body’s B cells and T cells to react quickly if faced with a flu virus. 

It’s all part of a National Institutes of Health–funded effort to develop a universal flu vaccine, with hopes of heading off future flu pandemics. Annual shots protect against flu subtypes known to spread in humans. But many subtypes circulate in animals, like birds and pigs, and occasionally jump to humans, causing pandemics. 

“The current vaccines provide very little protection against these other subtypes,” says lead study author Scott Hensley, PhD, a professor of microbiology at UPenn. “We set out to make a vaccine that would provide some level of immunity against essentially every influenza subtype we know about.” 

That’s 20 subtypes altogether. The unique properties of mRNA vaccines make immune responses against all those antigens possible, Dr. Hensley says. 

Old-school vaccines introduce a weakened or dead bacteria or virus into the body, but mRNA vaccines use mRNA encoded with a protein from the virus. That’s the “spike” protein for COVID, and for the experimental vaccine, it’s hemagglutinin, the major protein found on the surface of all flu viruses.

Mice and ferrets that had never been exposed to the flu were given the vaccine and produced high levels of antibodies against all 20 flu subtypes. Vaccinated mice exposed to the exact strains in the vaccine stayed pretty healthy, while those exposed to strains not found in the vaccine got sick but recovered quickly and survived. Unvaccinated mice exposed to the flu strain died. 

The vaccine seems to be able to “induce broad immunity against all the different influenza subtypes,” Dr. Hensley says, preventing severe illness if not infection overall. 

Still, whether it could truly stave off a pandemic that hasn’t happened yet is hard to say, Dr. Levy cautions. 

“We are going to need to better learn the molecular rules by which these vaccines protect,” he says.

But the UPenn team is forging ahead, with plans to test their vaccine in human adults in 2023 to determine safety, dosing, and antibody response.

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

The percentage of people in the U.S. getting the latest COVID-19 booster shot has crept up by single digits in the past couple months, despite health officials pleading for people to do so before the Christmas holiday. 

Now, a new poll shows why so few people are willing to roll up their sleeves again.

The most common reasons people give for not getting the latest booster shot is that they “don’t think they need one” (44%) and they “don’t think the benefits are worth it” (37%), according to poll results from the Kaiser Family Foundation. 

The data comes amid announcements by the Centers for Disease Control and Prevention that boosters reduced COVID-19 hospitalizations by up to 57% for U.S. adults and by up to 84% for people age 65 and older. Those figures are just the latest in a mountain of research reporting the public health benefits of COVID-19 vaccines.

Despite all of the statistical data, health officials’ recent vaccination campaigns have proven far from compelling. 

So far, just 15% of people age 12 and older have gotten the latest booster, and 36% of people age 65 and older have gotten it, the CDC’s vaccination trackershows.

Since the start of the pandemic, 1.1 million people in the U.S. have died from COVID-19, with the number of deaths currently rising by 400 per day, The New York Times COVID tracker shows.

Many experts continue to note the need for everyone to get booster shots regularly, but some advocate that perhaps a change in strategy is in order.

“What the administration should do is push for vaccinating people in high-risk groups, including those who are older, those who are immunocompromised and those who have comorbidities,” Paul Offitt, MD, director of the Vaccine Education Center at Children’s Hospital of Philadelphia, told CNN.

Federal regulators have announced they will meet Jan. 26 with a panel of vaccine advisors to examine the current recommended vaccination schedule as well as look at the effectiveness and composition of current vaccines and boosters, with an eye toward the make-up of next-generation shots.

Vaccines are the “best available protection” against hospitalization and death caused by COVID-19, said Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, in a statement announcing the planned meeting.

“Since the initial authorizations of these vaccines, we have learned that protection wanes over time, especially as the virus rapidly mutates and new variants and subvariants emerge,” he said. “Therefore, it’s important to continue discussions about the optimal composition of COVID-19 vaccines for primary and booster vaccination, as well as the optimal interval for booster vaccination.”

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

The percentage of people in the U.S. getting the latest COVID-19 booster shot has crept up by single digits in the past couple months, despite health officials pleading for people to do so before the Christmas holiday. 

Now, a new poll shows why so few people are willing to roll up their sleeves again.

The most common reasons people give for not getting the latest booster shot is that they “don’t think they need one” (44%) and they “don’t think the benefits are worth it” (37%), according to poll results from the Kaiser Family Foundation. 

The data comes amid announcements by the Centers for Disease Control and Prevention that boosters reduced COVID-19 hospitalizations by up to 57% for U.S. adults and by up to 84% for people age 65 and older. Those figures are just the latest in a mountain of research reporting the public health benefits of COVID-19 vaccines.

Despite all of the statistical data, health officials’ recent vaccination campaigns have proven far from compelling. 

So far, just 15% of people age 12 and older have gotten the latest booster, and 36% of people age 65 and older have gotten it, the CDC’s vaccination trackershows.

Since the start of the pandemic, 1.1 million people in the U.S. have died from COVID-19, with the number of deaths currently rising by 400 per day, The New York Times COVID tracker shows.

Many experts continue to note the need for everyone to get booster shots regularly, but some advocate that perhaps a change in strategy is in order.

“What the administration should do is push for vaccinating people in high-risk groups, including those who are older, those who are immunocompromised and those who have comorbidities,” Paul Offitt, MD, director of the Vaccine Education Center at Children’s Hospital of Philadelphia, told CNN.

Federal regulators have announced they will meet Jan. 26 with a panel of vaccine advisors to examine the current recommended vaccination schedule as well as look at the effectiveness and composition of current vaccines and boosters, with an eye toward the make-up of next-generation shots.

Vaccines are the “best available protection” against hospitalization and death caused by COVID-19, said Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, in a statement announcing the planned meeting.

“Since the initial authorizations of these vaccines, we have learned that protection wanes over time, especially as the virus rapidly mutates and new variants and subvariants emerge,” he said. “Therefore, it’s important to continue discussions about the optimal composition of COVID-19 vaccines for primary and booster vaccination, as well as the optimal interval for booster vaccination.”

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

The percentage of people in the U.S. getting the latest COVID-19 booster shot has crept up by single digits in the past couple months, despite health officials pleading for people to do so before the Christmas holiday. 

Now, a new poll shows why so few people are willing to roll up their sleeves again.

The most common reasons people give for not getting the latest booster shot is that they “don’t think they need one” (44%) and they “don’t think the benefits are worth it” (37%), according to poll results from the Kaiser Family Foundation. 

The data comes amid announcements by the Centers for Disease Control and Prevention that boosters reduced COVID-19 hospitalizations by up to 57% for U.S. adults and by up to 84% for people age 65 and older. Those figures are just the latest in a mountain of research reporting the public health benefits of COVID-19 vaccines.

Despite all of the statistical data, health officials’ recent vaccination campaigns have proven far from compelling. 

So far, just 15% of people age 12 and older have gotten the latest booster, and 36% of people age 65 and older have gotten it, the CDC’s vaccination trackershows.

Since the start of the pandemic, 1.1 million people in the U.S. have died from COVID-19, with the number of deaths currently rising by 400 per day, The New York Times COVID tracker shows.

Many experts continue to note the need for everyone to get booster shots regularly, but some advocate that perhaps a change in strategy is in order.

“What the administration should do is push for vaccinating people in high-risk groups, including those who are older, those who are immunocompromised and those who have comorbidities,” Paul Offitt, MD, director of the Vaccine Education Center at Children’s Hospital of Philadelphia, told CNN.

Federal regulators have announced they will meet Jan. 26 with a panel of vaccine advisors to examine the current recommended vaccination schedule as well as look at the effectiveness and composition of current vaccines and boosters, with an eye toward the make-up of next-generation shots.

Vaccines are the “best available protection” against hospitalization and death caused by COVID-19, said Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, in a statement announcing the planned meeting.

“Since the initial authorizations of these vaccines, we have learned that protection wanes over time, especially as the virus rapidly mutates and new variants and subvariants emerge,” he said. “Therefore, it’s important to continue discussions about the optimal composition of COVID-19 vaccines for primary and booster vaccination, as well as the optimal interval for booster vaccination.”

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

It was the last monoclonal antibody treatment standing. But less than 10 months after the U.S. Food and Drug Administration gave bebtelovimab its emergency use authorization (EUA) to fight COVID-19, it earlier this month de-authorized it, just as it had for other monoclonal antibody treatments, and for the same reason: The treatments were outwitted by the viral mutations.
 

Bebtelovimab couldn’t neutralize the Omicron subvariants BQ.1 and BQ.1.1, the cause of nearly 60% of COVID cases nationally as of November 30.

Next on the chopping block, some predict, will be Evusheld, the combination of tixagevimab and cilgavimab given as a preventive monoclonal antibody to people who are immunocompromised and at high risk of contracting COVID and to those who can’t take the vaccine. In October, the FDA warned that Evusheld was not neutralizing circulating COVID variants.

As the options for treating and preventing COVID decline, will companies rally quickly to develop new ones, or cut their losses in developing treatments that may work for only a few months, given the speed of viral mutations?

But although monoclonal antibody treatments are off the table, at least for now, antiviral drugs – including Paxlovid – are still very much available, and some say underused.

Others suggest it’s time to resurrect interest in convalescent plasma, a treatment used early in the pandemic before drugs or vaccines were here and still authorized for use in those who are immunosuppressed or receiving immunosuppressive treatment.

And on the prevention front, staying up to date with booster vaccines, masking, and taking other precautions should be stressed more, others say, regardless of the number of treatment options, and especially now, as cases rise and people gather for the winter holidays.
 

‘A major setback’

The bebtelovimab de-authorization was “a major setback,” but an understandable one, said Arturo Casadevall, MD, PhD, professor and chair of molecular microbiology and immunology at the Johns Hopkins Bloomberg School of Public Health in Baltimore. “Monoclonal antibodies are great drugs. We are in an unfortunate situation in that they are vulnerable to changes in the virus” and can’t offer long-lasting protection.

Supplies of bebtelovimab will be retained, according to the FDA, in case variants susceptible to it return.

“What happened to bebtelovimab is no surprise,” agreed Amesh Adalja, MD, senior scholar at Johns Hopkins Center for Health Security. “This is what is going to happen when you are targeting a virus that mutates a lot.”

Monoclonal antibodies work by binding to the spike protein on the virus surface to prevent it from entering cells.

However, Dr. Adalja doesn’t view the disappearance of monoclonal antibody treatments as a major setback. Monoclonal antibodies were not the primary way COVID was treated, he said.

While he does believe it’s important that more monoclonal antibody treatments be developed, “I think it’s important to remember we still have Paxlovid while everyone is lamenting the loss of bebtelovimab.’’
 

Antivirals: What’s here, what’s coming

Compared with monoclonal antibodies, “Paxlovid remains a much easier drug to give,” Dr. Adalja told this news organization, because it is taken orally, not intravenously.

And it’s effective. In a recent study, researchers found that adults diagnosed with COVID given Paxlovid within 5 days of diagnosis had a 51% lower hospitalization rate within the next 30 days than those not given it. Another study shows it could also reduce a person’s risk of developing long COVID by 26%.

Paxlovid is underused, Dr. Adalja said, partly because the rebound potential got more press than the effectiveness. When a celebrity got rebound from Paxlovid, he said, that would make the news, overshadowing the research on its effectiveness.

Besides Paxlovid, the antivirals remdesivir (Veklury), given intravenously for 3 days, and molnupiravir (Lagevrio), taken orally, are also still available. Antivirals work by targeting specific parts of the virus to prevent it from multiplying.

In the lab, remdesivir, molnupiravir, and another antiviral, nirmatrelvir, all appear to be effective against both BQ.1.1 (a BA.5 subvariant) and XBB (a BA.2 subvariant), both rapidly rising in the United States, according to a report last week in the New England Journal of Medicine.

The researchers also tested several monoclonal antibodies and found they did not neutralize either of the subvariants BQ.1.1 and XBB.

A new oral antiviral, Xocova (ensitrelvir fumaric acid), from Japanese manufacturer Shionogi, received emergency approval in Japan on November 22. It’s taken once a day for 5 days. The goal is to expand access to it globally, according to the company.

Pardes Biosciences launched a phase 2 trial in September for its oral antiviral drug (PBI-0451), under study as a treatment and preventive for COVID. It expects data by the first quarter of 2023.

Pfizer, which makes Paxlovid, has partnered with Clear Creek Bio to develop another oral antiviral COVID drug.
 

Other approaches

A receptor protein known as ACE2 (angiotensin-converting enzyme 2) is the main “doorway” that SARS-CoV-2 uses to enter and infect cells.

Dana-Farber Cancer Institute scientists are developing a “decoy” drug that works by mimicking the ACE2 receptor on the surface of cells; when the virus tries to bind to it, the spike protein is destroyed. Human trials have not yet started.

Other researchers are investigating whether an already-approved drug used to treat a liver disease, Actigall (UDCA/ursodeoxycholic acid), could protect against COVID infection by reducing ACE2.

So far, the researchers have found in early research that people taking UDCA for liver conditions were less likely than those not taking the drug to have severe COVID. They also found that UDCA reduced SARS-CoV-2 infection in human lungs maintained outside the body.
 

Monoclonal antibody treatments?

After the FDA decision to withdraw the bebtelovimab EUA, which Eli Lilly said it agreed with, the company issued a statement, promising it wasn’t giving up on monoclonal antibody treatments.

“Lilly will continue to search and evaluate monoclonal antibodies to identify potential candidates for clinical development against new variants,” it read in part.

AstraZeneca, which makes Evusheld, is also continuing to work on monoclonal antibody development. According to a spokesperson, “We are also developing a new long-acting antibody combination – AZD5156 – which has been shown in the lab to neutralize emerging new variants and all known variants to date. We are working to accelerate the development of AZD5156 to make it available at the end of 2023.”

The AstraZeneca spokesperson said he could share no more information about what the combination would include.
 

A convalescent plasma comeback?

Although Paxlovid can help, there are many contraindications to it, such as drug-drug interactions, Dr. Casadevall told this news organization. And now that the monoclonal antibody treatments have been paused, convalescent plasma “is the only antibody-based therapy that is reliably available. Convalescent plasma includes thousands of different antibodies.”

With his colleagues, Dr. Casadevall evaluated plasma samples from 740 patients. Some had received booster vaccines and been infected with Omicron, others had received boosters and not been infected, and still others had not been vaccinated and became infected.

In a report (not yet peer-reviewed), they found the plasma from those who had been infected or boosted within the past 6 months neutralized the new Omicron variants BQ.1.1, XBB.1, and BF.7.
 

A push for boosters, masks

To get through the coming months, taking precautions like masking and distancing and staying up to date on booster vaccinations, especially for older adults, can make a difference, other experts say.

In a Twitter thread in early December, Peter Hotez, MD, PhD, professor of pediatrics and molecular virology and microbiology at Baylor College of Medicine, Houston, urged people to take COVID seriously as holiday parties and gatherings occur.

“The single most impactful thing you can do is get your bivalent booster,” he tweeted, as well as give your kids the booster, citing preliminary research that the bivalent mRNA booster broadens immunity against the Omicron subvariants.

For seniors, he said, ‘‘if you get breakthrough COVID, [it’s] really important to get Paxlovid.” Masks will help not only for COVID but also influenza, respiratory syncytial virus (RSV), and other conditions.

Mitigation measures have largely been abandoned, according to Eric Topol, MD, director of the Scripps Research Translational Institute, La Jolla, Calif., and editor-in-chief of Medscape. In an op-ed in the Los Angeles Times, and on his Twitter feed, he reminds people about masking and urges people to get the bivalent booster.

According to the Centers for Disease Control and Prevention, as of Dec. 8, only 13.5% of people aged 5 and older have gotten an updated booster, despite research that shows an increase in antibodies to BQ.1.1. Recent research has found that the bivalent booster increases antibodies to BQ.1.1 by up to 10-fold, Dr. Topol said.

Dr. Adalja is on advisory boards for Shionogi, GSK, and Pardes. Dr. Casadevall reports no relevant financial relationships.

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

It was the last monoclonal antibody treatment standing. But less than 10 months after the U.S. Food and Drug Administration gave bebtelovimab its emergency use authorization (EUA) to fight COVID-19, it earlier this month de-authorized it, just as it had for other monoclonal antibody treatments, and for the same reason: The treatments were outwitted by the viral mutations.
 

Bebtelovimab couldn’t neutralize the Omicron subvariants BQ.1 and BQ.1.1, the cause of nearly 60% of COVID cases nationally as of November 30.

Next on the chopping block, some predict, will be Evusheld, the combination of tixagevimab and cilgavimab given as a preventive monoclonal antibody to people who are immunocompromised and at high risk of contracting COVID and to those who can’t take the vaccine. In October, the FDA warned that Evusheld was not neutralizing circulating COVID variants.

As the options for treating and preventing COVID decline, will companies rally quickly to develop new ones, or cut their losses in developing treatments that may work for only a few months, given the speed of viral mutations?

But although monoclonal antibody treatments are off the table, at least for now, antiviral drugs – including Paxlovid – are still very much available, and some say underused.

Others suggest it’s time to resurrect interest in convalescent plasma, a treatment used early in the pandemic before drugs or vaccines were here and still authorized for use in those who are immunosuppressed or receiving immunosuppressive treatment.

And on the prevention front, staying up to date with booster vaccines, masking, and taking other precautions should be stressed more, others say, regardless of the number of treatment options, and especially now, as cases rise and people gather for the winter holidays.
 

‘A major setback’

The bebtelovimab de-authorization was “a major setback,” but an understandable one, said Arturo Casadevall, MD, PhD, professor and chair of molecular microbiology and immunology at the Johns Hopkins Bloomberg School of Public Health in Baltimore. “Monoclonal antibodies are great drugs. We are in an unfortunate situation in that they are vulnerable to changes in the virus” and can’t offer long-lasting protection.

Supplies of bebtelovimab will be retained, according to the FDA, in case variants susceptible to it return.

“What happened to bebtelovimab is no surprise,” agreed Amesh Adalja, MD, senior scholar at Johns Hopkins Center for Health Security. “This is what is going to happen when you are targeting a virus that mutates a lot.”

Monoclonal antibodies work by binding to the spike protein on the virus surface to prevent it from entering cells.

However, Dr. Adalja doesn’t view the disappearance of monoclonal antibody treatments as a major setback. Monoclonal antibodies were not the primary way COVID was treated, he said.

While he does believe it’s important that more monoclonal antibody treatments be developed, “I think it’s important to remember we still have Paxlovid while everyone is lamenting the loss of bebtelovimab.’’
 

Antivirals: What’s here, what’s coming

Compared with monoclonal antibodies, “Paxlovid remains a much easier drug to give,” Dr. Adalja told this news organization, because it is taken orally, not intravenously.

And it’s effective. In a recent study, researchers found that adults diagnosed with COVID given Paxlovid within 5 days of diagnosis had a 51% lower hospitalization rate within the next 30 days than those not given it. Another study shows it could also reduce a person’s risk of developing long COVID by 26%.

Paxlovid is underused, Dr. Adalja said, partly because the rebound potential got more press than the effectiveness. When a celebrity got rebound from Paxlovid, he said, that would make the news, overshadowing the research on its effectiveness.

Besides Paxlovid, the antivirals remdesivir (Veklury), given intravenously for 3 days, and molnupiravir (Lagevrio), taken orally, are also still available. Antivirals work by targeting specific parts of the virus to prevent it from multiplying.

In the lab, remdesivir, molnupiravir, and another antiviral, nirmatrelvir, all appear to be effective against both BQ.1.1 (a BA.5 subvariant) and XBB (a BA.2 subvariant), both rapidly rising in the United States, according to a report last week in the New England Journal of Medicine.

The researchers also tested several monoclonal antibodies and found they did not neutralize either of the subvariants BQ.1.1 and XBB.

A new oral antiviral, Xocova (ensitrelvir fumaric acid), from Japanese manufacturer Shionogi, received emergency approval in Japan on November 22. It’s taken once a day for 5 days. The goal is to expand access to it globally, according to the company.

Pardes Biosciences launched a phase 2 trial in September for its oral antiviral drug (PBI-0451), under study as a treatment and preventive for COVID. It expects data by the first quarter of 2023.

Pfizer, which makes Paxlovid, has partnered with Clear Creek Bio to develop another oral antiviral COVID drug.
 

Other approaches

A receptor protein known as ACE2 (angiotensin-converting enzyme 2) is the main “doorway” that SARS-CoV-2 uses to enter and infect cells.

Dana-Farber Cancer Institute scientists are developing a “decoy” drug that works by mimicking the ACE2 receptor on the surface of cells; when the virus tries to bind to it, the spike protein is destroyed. Human trials have not yet started.

Other researchers are investigating whether an already-approved drug used to treat a liver disease, Actigall (UDCA/ursodeoxycholic acid), could protect against COVID infection by reducing ACE2.

So far, the researchers have found in early research that people taking UDCA for liver conditions were less likely than those not taking the drug to have severe COVID. They also found that UDCA reduced SARS-CoV-2 infection in human lungs maintained outside the body.
 

Monoclonal antibody treatments?

After the FDA decision to withdraw the bebtelovimab EUA, which Eli Lilly said it agreed with, the company issued a statement, promising it wasn’t giving up on monoclonal antibody treatments.

“Lilly will continue to search and evaluate monoclonal antibodies to identify potential candidates for clinical development against new variants,” it read in part.

AstraZeneca, which makes Evusheld, is also continuing to work on monoclonal antibody development. According to a spokesperson, “We are also developing a new long-acting antibody combination – AZD5156 – which has been shown in the lab to neutralize emerging new variants and all known variants to date. We are working to accelerate the development of AZD5156 to make it available at the end of 2023.”

The AstraZeneca spokesperson said he could share no more information about what the combination would include.
 

A convalescent plasma comeback?

Although Paxlovid can help, there are many contraindications to it, such as drug-drug interactions, Dr. Casadevall told this news organization. And now that the monoclonal antibody treatments have been paused, convalescent plasma “is the only antibody-based therapy that is reliably available. Convalescent plasma includes thousands of different antibodies.”

With his colleagues, Dr. Casadevall evaluated plasma samples from 740 patients. Some had received booster vaccines and been infected with Omicron, others had received boosters and not been infected, and still others had not been vaccinated and became infected.

In a report (not yet peer-reviewed), they found the plasma from those who had been infected or boosted within the past 6 months neutralized the new Omicron variants BQ.1.1, XBB.1, and BF.7.
 

A push for boosters, masks

To get through the coming months, taking precautions like masking and distancing and staying up to date on booster vaccinations, especially for older adults, can make a difference, other experts say.

In a Twitter thread in early December, Peter Hotez, MD, PhD, professor of pediatrics and molecular virology and microbiology at Baylor College of Medicine, Houston, urged people to take COVID seriously as holiday parties and gatherings occur.

“The single most impactful thing you can do is get your bivalent booster,” he tweeted, as well as give your kids the booster, citing preliminary research that the bivalent mRNA booster broadens immunity against the Omicron subvariants.

For seniors, he said, ‘‘if you get breakthrough COVID, [it’s] really important to get Paxlovid.” Masks will help not only for COVID but also influenza, respiratory syncytial virus (RSV), and other conditions.

Mitigation measures have largely been abandoned, according to Eric Topol, MD, director of the Scripps Research Translational Institute, La Jolla, Calif., and editor-in-chief of Medscape. In an op-ed in the Los Angeles Times, and on his Twitter feed, he reminds people about masking and urges people to get the bivalent booster.

According to the Centers for Disease Control and Prevention, as of Dec. 8, only 13.5% of people aged 5 and older have gotten an updated booster, despite research that shows an increase in antibodies to BQ.1.1. Recent research has found that the bivalent booster increases antibodies to BQ.1.1 by up to 10-fold, Dr. Topol said.

Dr. Adalja is on advisory boards for Shionogi, GSK, and Pardes. Dr. Casadevall reports no relevant financial relationships.

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

It was the last monoclonal antibody treatment standing. But less than 10 months after the U.S. Food and Drug Administration gave bebtelovimab its emergency use authorization (EUA) to fight COVID-19, it earlier this month de-authorized it, just as it had for other monoclonal antibody treatments, and for the same reason: The treatments were outwitted by the viral mutations.
 

Bebtelovimab couldn’t neutralize the Omicron subvariants BQ.1 and BQ.1.1, the cause of nearly 60% of COVID cases nationally as of November 30.

Next on the chopping block, some predict, will be Evusheld, the combination of tixagevimab and cilgavimab given as a preventive monoclonal antibody to people who are immunocompromised and at high risk of contracting COVID and to those who can’t take the vaccine. In October, the FDA warned that Evusheld was not neutralizing circulating COVID variants.

As the options for treating and preventing COVID decline, will companies rally quickly to develop new ones, or cut their losses in developing treatments that may work for only a few months, given the speed of viral mutations?

But although monoclonal antibody treatments are off the table, at least for now, antiviral drugs – including Paxlovid – are still very much available, and some say underused.

Others suggest it’s time to resurrect interest in convalescent plasma, a treatment used early in the pandemic before drugs or vaccines were here and still authorized for use in those who are immunosuppressed or receiving immunosuppressive treatment.

And on the prevention front, staying up to date with booster vaccines, masking, and taking other precautions should be stressed more, others say, regardless of the number of treatment options, and especially now, as cases rise and people gather for the winter holidays.
 

‘A major setback’

The bebtelovimab de-authorization was “a major setback,” but an understandable one, said Arturo Casadevall, MD, PhD, professor and chair of molecular microbiology and immunology at the Johns Hopkins Bloomberg School of Public Health in Baltimore. “Monoclonal antibodies are great drugs. We are in an unfortunate situation in that they are vulnerable to changes in the virus” and can’t offer long-lasting protection.

Supplies of bebtelovimab will be retained, according to the FDA, in case variants susceptible to it return.

“What happened to bebtelovimab is no surprise,” agreed Amesh Adalja, MD, senior scholar at Johns Hopkins Center for Health Security. “This is what is going to happen when you are targeting a virus that mutates a lot.”

Monoclonal antibodies work by binding to the spike protein on the virus surface to prevent it from entering cells.

However, Dr. Adalja doesn’t view the disappearance of monoclonal antibody treatments as a major setback. Monoclonal antibodies were not the primary way COVID was treated, he said.

While he does believe it’s important that more monoclonal antibody treatments be developed, “I think it’s important to remember we still have Paxlovid while everyone is lamenting the loss of bebtelovimab.’’
 

Antivirals: What’s here, what’s coming

Compared with monoclonal antibodies, “Paxlovid remains a much easier drug to give,” Dr. Adalja told this news organization, because it is taken orally, not intravenously.

And it’s effective. In a recent study, researchers found that adults diagnosed with COVID given Paxlovid within 5 days of diagnosis had a 51% lower hospitalization rate within the next 30 days than those not given it. Another study shows it could also reduce a person’s risk of developing long COVID by 26%.

Paxlovid is underused, Dr. Adalja said, partly because the rebound potential got more press than the effectiveness. When a celebrity got rebound from Paxlovid, he said, that would make the news, overshadowing the research on its effectiveness.

Besides Paxlovid, the antivirals remdesivir (Veklury), given intravenously for 3 days, and molnupiravir (Lagevrio), taken orally, are also still available. Antivirals work by targeting specific parts of the virus to prevent it from multiplying.

In the lab, remdesivir, molnupiravir, and another antiviral, nirmatrelvir, all appear to be effective against both BQ.1.1 (a BA.5 subvariant) and XBB (a BA.2 subvariant), both rapidly rising in the United States, according to a report last week in the New England Journal of Medicine.

The researchers also tested several monoclonal antibodies and found they did not neutralize either of the subvariants BQ.1.1 and XBB.

A new oral antiviral, Xocova (ensitrelvir fumaric acid), from Japanese manufacturer Shionogi, received emergency approval in Japan on November 22. It’s taken once a day for 5 days. The goal is to expand access to it globally, according to the company.

Pardes Biosciences launched a phase 2 trial in September for its oral antiviral drug (PBI-0451), under study as a treatment and preventive for COVID. It expects data by the first quarter of 2023.

Pfizer, which makes Paxlovid, has partnered with Clear Creek Bio to develop another oral antiviral COVID drug.
 

Other approaches

A receptor protein known as ACE2 (angiotensin-converting enzyme 2) is the main “doorway” that SARS-CoV-2 uses to enter and infect cells.

Dana-Farber Cancer Institute scientists are developing a “decoy” drug that works by mimicking the ACE2 receptor on the surface of cells; when the virus tries to bind to it, the spike protein is destroyed. Human trials have not yet started.

Other researchers are investigating whether an already-approved drug used to treat a liver disease, Actigall (UDCA/ursodeoxycholic acid), could protect against COVID infection by reducing ACE2.

So far, the researchers have found in early research that people taking UDCA for liver conditions were less likely than those not taking the drug to have severe COVID. They also found that UDCA reduced SARS-CoV-2 infection in human lungs maintained outside the body.
 

Monoclonal antibody treatments?

After the FDA decision to withdraw the bebtelovimab EUA, which Eli Lilly said it agreed with, the company issued a statement, promising it wasn’t giving up on monoclonal antibody treatments.

“Lilly will continue to search and evaluate monoclonal antibodies to identify potential candidates for clinical development against new variants,” it read in part.

AstraZeneca, which makes Evusheld, is also continuing to work on monoclonal antibody development. According to a spokesperson, “We are also developing a new long-acting antibody combination – AZD5156 – which has been shown in the lab to neutralize emerging new variants and all known variants to date. We are working to accelerate the development of AZD5156 to make it available at the end of 2023.”

The AstraZeneca spokesperson said he could share no more information about what the combination would include.
 

A convalescent plasma comeback?

Although Paxlovid can help, there are many contraindications to it, such as drug-drug interactions, Dr. Casadevall told this news organization. And now that the monoclonal antibody treatments have been paused, convalescent plasma “is the only antibody-based therapy that is reliably available. Convalescent plasma includes thousands of different antibodies.”

With his colleagues, Dr. Casadevall evaluated plasma samples from 740 patients. Some had received booster vaccines and been infected with Omicron, others had received boosters and not been infected, and still others had not been vaccinated and became infected.

In a report (not yet peer-reviewed), they found the plasma from those who had been infected or boosted within the past 6 months neutralized the new Omicron variants BQ.1.1, XBB.1, and BF.7.
 

A push for boosters, masks

To get through the coming months, taking precautions like masking and distancing and staying up to date on booster vaccinations, especially for older adults, can make a difference, other experts say.

In a Twitter thread in early December, Peter Hotez, MD, PhD, professor of pediatrics and molecular virology and microbiology at Baylor College of Medicine, Houston, urged people to take COVID seriously as holiday parties and gatherings occur.

“The single most impactful thing you can do is get your bivalent booster,” he tweeted, as well as give your kids the booster, citing preliminary research that the bivalent mRNA booster broadens immunity against the Omicron subvariants.

For seniors, he said, ‘‘if you get breakthrough COVID, [it’s] really important to get Paxlovid.” Masks will help not only for COVID but also influenza, respiratory syncytial virus (RSV), and other conditions.

Mitigation measures have largely been abandoned, according to Eric Topol, MD, director of the Scripps Research Translational Institute, La Jolla, Calif., and editor-in-chief of Medscape. In an op-ed in the Los Angeles Times, and on his Twitter feed, he reminds people about masking and urges people to get the bivalent booster.

According to the Centers for Disease Control and Prevention, as of Dec. 8, only 13.5% of people aged 5 and older have gotten an updated booster, despite research that shows an increase in antibodies to BQ.1.1. Recent research has found that the bivalent booster increases antibodies to BQ.1.1 by up to 10-fold, Dr. Topol said.

Dr. Adalja is on advisory boards for Shionogi, GSK, and Pardes. Dr. Casadevall reports no relevant financial relationships.

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

First described in 2020 by researchers from the U.S. National Institutes of Health, VEXAS syndrome is a systemic autoinflammatory disease of undefined origin. Its name is an acronym: Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic. The prevalence of this syndrome is unknown, but it is not so rare. As it is an X-linked disease, men are predominantly affected.

First identification

The NIH team screened the exomes and genomes of 2,560 individuals. Of this group, 1,477 had been referred because of undiagnosed recurrent fevers, systemic inflammation, or both, and 1,083 were affected by atypical, unclassified disorders. The researchers identified 25 men with a somatic mutation in the ubiquitin-like modifier activating enzyme 1 (UBA1) gene, which is involved in the protein ubiquitylation system. This posttranslational modification has a pleiotropic function that likely explains the clinical heterogeneity seen in VEXAS patients: regulation of protein turnover, especially those involved in the cell cycle, cell death, and signal transduction. Ubiquitylation is also involved in nonproteolytic functions, such as assembly of multiprotein complexes, intracellular signaling, inflammatory signaling, and DNA repair.

Clinical presentation

The clinicobiological presentation of VEXAS syndrome is very heterogeneous. Typically, patients present with a systemic inflammatory disease with unexplained episodes of fever, involvement of the lungs, skin, blood vessels, and joints. Molecular diagnosis is made by the sequencing of UBA1.

Most patients present with the characteristic clinical signs of other inflammatory diseases, such as polyarteritis nodosa and recurrent polychondritis. But VEXAS patients are at high risk of developing hematologic conditions. Indeed, the following were seen among the 25 participants in the NIH study: macrocytic anemia (96%), venous thromboembolism (44%), myelodysplastic syndrome (24%), and multiple myeloma or monoclonal gammopathy of undetermined significance (20%).

In VEXAS patients, levels of serum inflammatory markers are increased. These markers include tumor necrosis factor, interleukin-8, interleukin-6, interferon-inducible protein-10, interferon-gamma, C-reactive protein. In addition, there is aberrant activation of innate immune-signaling pathways.

In a large-scale analysis of a multicenter case series of 116 French patients, researchers found that VEXAS syndrome primarily affected men. The disease was progressive, and onset occurred after age 50 years. These patients can be divided into three phenotypically distinct clusters on the basis of integration of clinical and biological data. In the 58 cases in which myelodysplastic syndrome was present, the mortality rates were higher. The researchers also reported that the UBA1 p.Met41L mutation was associated with a better prognosis.
 

Treatment data

VEXAS syndrome resists the classical therapeutic arsenal. Patients require high-dose glucocorticoids, and prognosis appears to be poor. The available treatment data are retrospective. Of the 25 participants in the NIH study, 40% died within 5 years from disease-related causes or complications related to treatment. Among the promising therapeutic avenues is the use of inhibitors of the Janus kinase pathway.

This article was translated from Univadis France. A version of this article appeared on Medscape.com.

First described in 2020 by researchers from the U.S. National Institutes of Health, VEXAS syndrome is a systemic autoinflammatory disease of undefined origin. Its name is an acronym: Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic. The prevalence of this syndrome is unknown, but it is not so rare. As it is an X-linked disease, men are predominantly affected.

First identification

The NIH team screened the exomes and genomes of 2,560 individuals. Of this group, 1,477 had been referred because of undiagnosed recurrent fevers, systemic inflammation, or both, and 1,083 were affected by atypical, unclassified disorders. The researchers identified 25 men with a somatic mutation in the ubiquitin-like modifier activating enzyme 1 (UBA1) gene, which is involved in the protein ubiquitylation system. This posttranslational modification has a pleiotropic function that likely explains the clinical heterogeneity seen in VEXAS patients: regulation of protein turnover, especially those involved in the cell cycle, cell death, and signal transduction. Ubiquitylation is also involved in nonproteolytic functions, such as assembly of multiprotein complexes, intracellular signaling, inflammatory signaling, and DNA repair.

Clinical presentation

The clinicobiological presentation of VEXAS syndrome is very heterogeneous. Typically, patients present with a systemic inflammatory disease with unexplained episodes of fever, involvement of the lungs, skin, blood vessels, and joints. Molecular diagnosis is made by the sequencing of UBA1.

Most patients present with the characteristic clinical signs of other inflammatory diseases, such as polyarteritis nodosa and recurrent polychondritis. But VEXAS patients are at high risk of developing hematologic conditions. Indeed, the following were seen among the 25 participants in the NIH study: macrocytic anemia (96%), venous thromboembolism (44%), myelodysplastic syndrome (24%), and multiple myeloma or monoclonal gammopathy of undetermined significance (20%).

In VEXAS patients, levels of serum inflammatory markers are increased. These markers include tumor necrosis factor, interleukin-8, interleukin-6, interferon-inducible protein-10, interferon-gamma, C-reactive protein. In addition, there is aberrant activation of innate immune-signaling pathways.

In a large-scale analysis of a multicenter case series of 116 French patients, researchers found that VEXAS syndrome primarily affected men. The disease was progressive, and onset occurred after age 50 years. These patients can be divided into three phenotypically distinct clusters on the basis of integration of clinical and biological data. In the 58 cases in which myelodysplastic syndrome was present, the mortality rates were higher. The researchers also reported that the UBA1 p.Met41L mutation was associated with a better prognosis.
 

Treatment data

VEXAS syndrome resists the classical therapeutic arsenal. Patients require high-dose glucocorticoids, and prognosis appears to be poor. The available treatment data are retrospective. Of the 25 participants in the NIH study, 40% died within 5 years from disease-related causes or complications related to treatment. Among the promising therapeutic avenues is the use of inhibitors of the Janus kinase pathway.

This article was translated from Univadis France. A version of this article appeared on Medscape.com.

First described in 2020 by researchers from the U.S. National Institutes of Health, VEXAS syndrome is a systemic autoinflammatory disease of undefined origin. Its name is an acronym: Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic. The prevalence of this syndrome is unknown, but it is not so rare. As it is an X-linked disease, men are predominantly affected.

First identification

The NIH team screened the exomes and genomes of 2,560 individuals. Of this group, 1,477 had been referred because of undiagnosed recurrent fevers, systemic inflammation, or both, and 1,083 were affected by atypical, unclassified disorders. The researchers identified 25 men with a somatic mutation in the ubiquitin-like modifier activating enzyme 1 (UBA1) gene, which is involved in the protein ubiquitylation system. This posttranslational modification has a pleiotropic function that likely explains the clinical heterogeneity seen in VEXAS patients: regulation of protein turnover, especially those involved in the cell cycle, cell death, and signal transduction. Ubiquitylation is also involved in nonproteolytic functions, such as assembly of multiprotein complexes, intracellular signaling, inflammatory signaling, and DNA repair.

Clinical presentation

The clinicobiological presentation of VEXAS syndrome is very heterogeneous. Typically, patients present with a systemic inflammatory disease with unexplained episodes of fever, involvement of the lungs, skin, blood vessels, and joints. Molecular diagnosis is made by the sequencing of UBA1.

Most patients present with the characteristic clinical signs of other inflammatory diseases, such as polyarteritis nodosa and recurrent polychondritis. But VEXAS patients are at high risk of developing hematologic conditions. Indeed, the following were seen among the 25 participants in the NIH study: macrocytic anemia (96%), venous thromboembolism (44%), myelodysplastic syndrome (24%), and multiple myeloma or monoclonal gammopathy of undetermined significance (20%).

In VEXAS patients, levels of serum inflammatory markers are increased. These markers include tumor necrosis factor, interleukin-8, interleukin-6, interferon-inducible protein-10, interferon-gamma, C-reactive protein. In addition, there is aberrant activation of innate immune-signaling pathways.

In a large-scale analysis of a multicenter case series of 116 French patients, researchers found that VEXAS syndrome primarily affected men. The disease was progressive, and onset occurred after age 50 years. These patients can be divided into three phenotypically distinct clusters on the basis of integration of clinical and biological data. In the 58 cases in which myelodysplastic syndrome was present, the mortality rates were higher. The researchers also reported that the UBA1 p.Met41L mutation was associated with a better prognosis.
 

Treatment data

VEXAS syndrome resists the classical therapeutic arsenal. Patients require high-dose glucocorticoids, and prognosis appears to be poor. The available treatment data are retrospective. Of the 25 participants in the NIH study, 40% died within 5 years from disease-related causes or complications related to treatment. Among the promising therapeutic avenues is the use of inhibitors of the Janus kinase pathway.

This article was translated from Univadis France. A version of this article appeared on Medscape.com.

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

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

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

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

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

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

Bacillus Calmette-Guérin (BCG) vaccines are given to more than 100 million children every year, but there is considerable debate regarding the effectiveness of BCG vaccination in preventing tuberculosis and death, particularly among older children and adults.

The most extensive study ever conducted on the efficacy of the BCG vaccine for protection against tuberculosis, stratified by age and history of previous tuberculosis, was published in September 2022 in The Lancet Global Health. The study, which comprises a systematic review and meta-analysis, analyzed individual-level data from 26 case-contact cohort studies published over the past 20 years. The studies included data from 70,000 participants. The primary outcome was a composite of prevalent (diagnosed at or within 90 days of baseline) and incident (diagnosed more than 90 days after baseline) tuberculosis in contacts exposed to tuberculosis. Secondary outcomes were pulmonary tuberculosis, extrapulmonary tuberculosis, and mortality.

Participants were characterized as having been exposed to tuberculosis if they were reported to have been a close contact (either living in the same household or having substantial interaction outside the household) of a person with microbiologically or radiologically diagnosed pulmonary tuberculosis. Previous tuberculosis was defined as a positive interferon-gamma (IFN-gamma) release assay or tuberculin skin test, also known as PPD or Mantoux test.

Most studies included in the analysis were conducted in the past 10 years in countries with a high tuberculosis burden. Those countries included India, South Africa, China, Vietnam, Indonesia, Uganda, the Gambia, and Brazil.
 

Primary outcomes

The study’s main findings included the following:

• The overall effectiveness of BCG vaccination against all forms of tuberculosis was 18% (adjusted odds ratio, 0.82; 95% CI, 0.74-0.91).
• Stratified by age, BCG vaccination only significantly protected against all tuberculosis in children younger than 5 years (aOR, 0.63; 95% CI, 0.49-0.81).
• There was no protective effect among those whose previous tests for tuberculosis were negative unless they were younger than 5 years (aOR, 0.54; 95% CI, 0.32-0.90).
• Among contacts who had a positive tuberculin skin test or IFN-gamma release assay, BCG vaccination significantly protected against tuberculosis among all participants (aOR, 0.81; 95% CI, 0.69-0.96), participants younger than 5 years (aOR, 0.68; 95% CI, 0.47-0.97), and participants aged 5-9 years (aOR, 0.62; 95% CI, 0.38-0.99).
• BCG vaccination was protective against pulmonary tuberculosis (19% effectiveness), but this effect was only seen in children younger than 3 years (42% effectiveness) when stratified by age.
• Protection against all tuberculosis and pulmonary tuberculosis was greater among female participants than male participants.

“This is a definitive BCG protection study because it involves a significant number of individuals evaluated using this meta-analysis. Protection is clearly lost with age. From as early as age 5, no protective effect can be observed. Protection, including against pulmonary tuberculosis, can be observed up to 3 years of age,” stated study author Julio Croda, MD, PhD, chair of the Brazilian Society of Tropical Medicine.

Dr. Croda emphasized that the findings from their study indicate that BCG vaccine protects against pulmonary tuberculosis and that those results differ from results of some previous studies.

“Every physician believes the BCG vaccine protects against serious forms of tuberculosis up to age 5. That fact is not surprising at all,” Dr. Croda remarked. “However, the fact that it protects against pulmonary tuberculosis, especially in children younger than 3, was surprising. In medical practice, we did not believe in this protection.”

Currently, 1.2% of new tuberculosis cases in Brazil occur among those younger than 5. Nevertheless, these cases represent 40.1% of new diagnoses recorded among those younger than 15, highlighting the importance of protection for this age group. An increase in extrapulmonary tuberculosis cases was recently observed in patients younger than 5.

Isabella Ballalai, MD, PhD, is deputy chair of the Brazilian Society of Immunizations. Although she did not participate in this study, she commented on its findings. “All publications are welcome; they help us think,” she explained. She emphasized that the BCG vaccine is not optimal. “There are studies indicating 80% efficacy and others indicating 0%. So, what we can look at is decades of effectiveness in practice.”

Dr. Ballalai explained that the BCG vaccine could keep severe forms of tuberculosis, meningitis, and miliary tuberculosis at bay. She shared her experience of caring for several patients with tuberculous meningitis shortly after she had graduated. “Today, thanks to the BCG vaccine, we don’t see it anymore.” However, she pointed out that the vaccine›s efficacy and effectiveness against pulmonary tuberculosis are low and that pulmonary tuberculosis remains the most significant problem among adults.

Dr. Ballalai also emphasized a few shortcomings of the study. “One is the definition of ‘vaccinated’ and ‘unvaccinated,’ which was based on the presence or absence of a mark on the arm. Today, we know that the absence of a mark does not indicate that the child has not been vaccinated, nor that the vaccine has not been effective. Therefore, several vaccinated participants may have been included amongst the unvaccinated participants.”

The authors emphasized that the definition of “vaccinated” and “unvaccinated” was based on a scar and on vaccination records, and they recognized that participants who did not have a scar on their arm could have been misclassified. Regardless, it is still considered a sensitive indicator. “Few vaccinated children from various settings do not show a scar years after vaccine administration,” they stated in their article.
 

Adults unprotected

Dr. Ballalai also shared her concerns regarding the lack of protection for older individuals. “We know those older than 60 are at greater risk for complications of tuberculosis. Individuals in this age group naturally have a lower immunity, and they usually have comorbidities. From this study, I can only conclude what was already expected: that adults who received a BCG vaccine as infants are not clear of pulmonary tuberculosis.”

Dr. Croda agreed that it was already evident that the BCG vaccine administered at birth did not provide protection for adults. “In the past, even with 80%-90% vaccine coverage, there were numerous tuberculosis cases in adults in Brazil.”
 

Are boosters needed?

The authors concluded that immunoprotection needs to be boosted in older populations, as vaccination at birth is ineffective for adolescents and adults. They have also discussed whether children older than 10 years and adults could benefit from a booster shot.

Dr. Croda emphasized that there is no indication for this, because there are no data regarding protection with a booster dose during adulthood. However, he cited a study conducted in South Africa in which the BCG vaccine was compared with another vaccine, and another study, which is being conducted in India, is assessing whether a BCG booster offers protection against pulmonary tuberculosis. “There are few studies. Perhaps the revaccination of more vulnerable groups could be of interest, but additional studies are needed first.”

Dr. Croda intends to assess revaccination in those deprived of liberty, in which the incidence of tuberculosis is very high. From 2015 to 2021, many new cases were recorded in this population in Brazil. The number rose from 5,860 to 6,773 during that period.

“However, BCG revaccination carries a significant risk of patients presenting with serious adverse events,” Dr. Ballalai pointed out. He noted that several years ago, to extend protection, Brazil adopted a booster program for persons aged 10 years or older, but the program was discontinued owing to the numerous adverse events reported and the absence of evidence of benefit from increased protection against tuberculosis.

“The adult groups at greater risk for severe tuberculosis manifestations normally presented with an underlying disease, particularly in immunocompromised patient groups. The [administration of the] BCG [vaccine] is contraindicated for those who are immunocompromised. And, for the older population, we do not have data on [vaccine] safety,” she emphasized.
 

Nonspecific immune protection

One of the study’s secondary outcomes regarded mortality. Four studies in the meta-analysis followed up tuberculosis contacts for death. In these studies, which evaluated 20,000 participants, BCG vaccination was shown to be significantly protective against death for participants younger than 15 years.

However, the authors urged caution in interpreting these data. They emphasized that they were unable to identify specific mechanisms by which BCG vaccination might have reduced mortality, and there are possible study biases that could have led to an overestimation of mortality benefit. Moreover, given the observational nature of the included studies, vaccinated children might have had higher socioeconomic status and greater access to health care, and they may have been more likely to have received other vaccinations, compared with children who did not receive BCG vaccines.

Nevertheless, previous experimental and observational studies have found that BCG vaccination might provide nonspecific or off-target immune protection against an array of other pathogens.

“In small studies conducted in Africa, those younger than 5 were protected not only against tuberculosis but also against other respiratory diseases,” Dr. Croda affirmed. “However, these are small studies, and for now, there is no recommendation for using BCG vaccination to prevent other respiratory infections.”

A long-awaited, critical study on the impact of the BCG vaccine on COVID-19, in which Brazilian researchers participated, will be published in the New England Journal of Medicine.
 

New vaccines needed

The BCG vaccine is one of the oldest vaccines, but there are still several crucial unanswered questions about its use.

Previously published studies that examined the protective effect of BCG vaccination only considered low-burden settings and the historical literature before 1950. These studies need updating, but doing so has not been a simple task. To answer their questions, individual-level participant data for a prespecified list of variables, including the characteristics of the exposed participant (contact), the index case, and the environment, were requested from authors of all eligible studies.

Much of the data used in the published research were found through discussions with authors and experts in the field, as well as through data deposited in data storage repositories, conference abstracts, dissertations, and even direct requests to the authors. “The Pan-American Health Organization helped with this data collection and contacting some authors,” said Dr. Croda.

With the new data, the authors confirmed that infant BCG vaccination, although important to young children who are at high risk for tuberculosis, does not prevent adult-type cavitary tuberculosis and is therefore insufficient to impede the tuberculosis epidemic. “Novel vaccines are urgently needed,” they concluded.

“We need to develop novel, more effective vaccines, which, when administered during infancy, would ensure lifelong protection,” Dr. Croda added.

Dr. Croda and Dr. Ballalai reported no relevant financial relationships.

This article was translated from the Medscape Portuguese edition. A version of this article appeared on Medscape.com.

Bacillus Calmette-Guérin (BCG) vaccines are given to more than 100 million children every year, but there is considerable debate regarding the effectiveness of BCG vaccination in preventing tuberculosis and death, particularly among older children and adults.

The most extensive study ever conducted on the efficacy of the BCG vaccine for protection against tuberculosis, stratified by age and history of previous tuberculosis, was published in September 2022 in The Lancet Global Health. The study, which comprises a systematic review and meta-analysis, analyzed individual-level data from 26 case-contact cohort studies published over the past 20 years. The studies included data from 70,000 participants. The primary outcome was a composite of prevalent (diagnosed at or within 90 days of baseline) and incident (diagnosed more than 90 days after baseline) tuberculosis in contacts exposed to tuberculosis. Secondary outcomes were pulmonary tuberculosis, extrapulmonary tuberculosis, and mortality.

Participants were characterized as having been exposed to tuberculosis if they were reported to have been a close contact (either living in the same household or having substantial interaction outside the household) of a person with microbiologically or radiologically diagnosed pulmonary tuberculosis. Previous tuberculosis was defined as a positive interferon-gamma (IFN-gamma) release assay or tuberculin skin test, also known as PPD or Mantoux test.

Most studies included in the analysis were conducted in the past 10 years in countries with a high tuberculosis burden. Those countries included India, South Africa, China, Vietnam, Indonesia, Uganda, the Gambia, and Brazil.
 

Primary outcomes

The study’s main findings included the following:

• The overall effectiveness of BCG vaccination against all forms of tuberculosis was 18% (adjusted odds ratio, 0.82; 95% CI, 0.74-0.91).
• Stratified by age, BCG vaccination only significantly protected against all tuberculosis in children younger than 5 years (aOR, 0.63; 95% CI, 0.49-0.81).
• There was no protective effect among those whose previous tests for tuberculosis were negative unless they were younger than 5 years (aOR, 0.54; 95% CI, 0.32-0.90).
• Among contacts who had a positive tuberculin skin test or IFN-gamma release assay, BCG vaccination significantly protected against tuberculosis among all participants (aOR, 0.81; 95% CI, 0.69-0.96), participants younger than 5 years (aOR, 0.68; 95% CI, 0.47-0.97), and participants aged 5-9 years (aOR, 0.62; 95% CI, 0.38-0.99).
• BCG vaccination was protective against pulmonary tuberculosis (19% effectiveness), but this effect was only seen in children younger than 3 years (42% effectiveness) when stratified by age.
• Protection against all tuberculosis and pulmonary tuberculosis was greater among female participants than male participants.

“This is a definitive BCG protection study because it involves a significant number of individuals evaluated using this meta-analysis. Protection is clearly lost with age. From as early as age 5, no protective effect can be observed. Protection, including against pulmonary tuberculosis, can be observed up to 3 years of age,” stated study author Julio Croda, MD, PhD, chair of the Brazilian Society of Tropical Medicine.

Dr. Croda emphasized that the findings from their study indicate that BCG vaccine protects against pulmonary tuberculosis and that those results differ from results of some previous studies.

“Every physician believes the BCG vaccine protects against serious forms of tuberculosis up to age 5. That fact is not surprising at all,” Dr. Croda remarked. “However, the fact that it protects against pulmonary tuberculosis, especially in children younger than 3, was surprising. In medical practice, we did not believe in this protection.”

Currently, 1.2% of new tuberculosis cases in Brazil occur among those younger than 5. Nevertheless, these cases represent 40.1% of new diagnoses recorded among those younger than 15, highlighting the importance of protection for this age group. An increase in extrapulmonary tuberculosis cases was recently observed in patients younger than 5.

Isabella Ballalai, MD, PhD, is deputy chair of the Brazilian Society of Immunizations. Although she did not participate in this study, she commented on its findings. “All publications are welcome; they help us think,” she explained. She emphasized that the BCG vaccine is not optimal. “There are studies indicating 80% efficacy and others indicating 0%. So, what we can look at is decades of effectiveness in practice.”

Dr. Ballalai explained that the BCG vaccine could keep severe forms of tuberculosis, meningitis, and miliary tuberculosis at bay. She shared her experience of caring for several patients with tuberculous meningitis shortly after she had graduated. “Today, thanks to the BCG vaccine, we don’t see it anymore.” However, she pointed out that the vaccine›s efficacy and effectiveness against pulmonary tuberculosis are low and that pulmonary tuberculosis remains the most significant problem among adults.

Dr. Ballalai also emphasized a few shortcomings of the study. “One is the definition of ‘vaccinated’ and ‘unvaccinated,’ which was based on the presence or absence of a mark on the arm. Today, we know that the absence of a mark does not indicate that the child has not been vaccinated, nor that the vaccine has not been effective. Therefore, several vaccinated participants may have been included amongst the unvaccinated participants.”

The authors emphasized that the definition of “vaccinated” and “unvaccinated” was based on a scar and on vaccination records, and they recognized that participants who did not have a scar on their arm could have been misclassified. Regardless, it is still considered a sensitive indicator. “Few vaccinated children from various settings do not show a scar years after vaccine administration,” they stated in their article.
 

Adults unprotected

Dr. Ballalai also shared her concerns regarding the lack of protection for older individuals. “We know those older than 60 are at greater risk for complications of tuberculosis. Individuals in this age group naturally have a lower immunity, and they usually have comorbidities. From this study, I can only conclude what was already expected: that adults who received a BCG vaccine as infants are not clear of pulmonary tuberculosis.”

Dr. Croda agreed that it was already evident that the BCG vaccine administered at birth did not provide protection for adults. “In the past, even with 80%-90% vaccine coverage, there were numerous tuberculosis cases in adults in Brazil.”
 

Are boosters needed?

The authors concluded that immunoprotection needs to be boosted in older populations, as vaccination at birth is ineffective for adolescents and adults. They have also discussed whether children older than 10 years and adults could benefit from a booster shot.

Dr. Croda emphasized that there is no indication for this, because there are no data regarding protection with a booster dose during adulthood. However, he cited a study conducted in South Africa in which the BCG vaccine was compared with another vaccine, and another study, which is being conducted in India, is assessing whether a BCG booster offers protection against pulmonary tuberculosis. “There are few studies. Perhaps the revaccination of more vulnerable groups could be of interest, but additional studies are needed first.”

Dr. Croda intends to assess revaccination in those deprived of liberty, in which the incidence of tuberculosis is very high. From 2015 to 2021, many new cases were recorded in this population in Brazil. The number rose from 5,860 to 6,773 during that period.

“However, BCG revaccination carries a significant risk of patients presenting with serious adverse events,” Dr. Ballalai pointed out. He noted that several years ago, to extend protection, Brazil adopted a booster program for persons aged 10 years or older, but the program was discontinued owing to the numerous adverse events reported and the absence of evidence of benefit from increased protection against tuberculosis.

“The adult groups at greater risk for severe tuberculosis manifestations normally presented with an underlying disease, particularly in immunocompromised patient groups. The [administration of the] BCG [vaccine] is contraindicated for those who are immunocompromised. And, for the older population, we do not have data on [vaccine] safety,” she emphasized.
 

Nonspecific immune protection

One of the study’s secondary outcomes regarded mortality. Four studies in the meta-analysis followed up tuberculosis contacts for death. In these studies, which evaluated 20,000 participants, BCG vaccination was shown to be significantly protective against death for participants younger than 15 years.

However, the authors urged caution in interpreting these data. They emphasized that they were unable to identify specific mechanisms by which BCG vaccination might have reduced mortality, and there are possible study biases that could have led to an overestimation of mortality benefit. Moreover, given the observational nature of the included studies, vaccinated children might have had higher socioeconomic status and greater access to health care, and they may have been more likely to have received other vaccinations, compared with children who did not receive BCG vaccines.

Nevertheless, previous experimental and observational studies have found that BCG vaccination might provide nonspecific or off-target immune protection against an array of other pathogens.

“In small studies conducted in Africa, those younger than 5 were protected not only against tuberculosis but also against other respiratory diseases,” Dr. Croda affirmed. “However, these are small studies, and for now, there is no recommendation for using BCG vaccination to prevent other respiratory infections.”

A long-awaited, critical study on the impact of the BCG vaccine on COVID-19, in which Brazilian researchers participated, will be published in the New England Journal of Medicine.
 

New vaccines needed

The BCG vaccine is one of the oldest vaccines, but there are still several crucial unanswered questions about its use.

Previously published studies that examined the protective effect of BCG vaccination only considered low-burden settings and the historical literature before 1950. These studies need updating, but doing so has not been a simple task. To answer their questions, individual-level participant data for a prespecified list of variables, including the characteristics of the exposed participant (contact), the index case, and the environment, were requested from authors of all eligible studies.

Much of the data used in the published research were found through discussions with authors and experts in the field, as well as through data deposited in data storage repositories, conference abstracts, dissertations, and even direct requests to the authors. “The Pan-American Health Organization helped with this data collection and contacting some authors,” said Dr. Croda.

With the new data, the authors confirmed that infant BCG vaccination, although important to young children who are at high risk for tuberculosis, does not prevent adult-type cavitary tuberculosis and is therefore insufficient to impede the tuberculosis epidemic. “Novel vaccines are urgently needed,” they concluded.

“We need to develop novel, more effective vaccines, which, when administered during infancy, would ensure lifelong protection,” Dr. Croda added.

Dr. Croda and Dr. Ballalai reported no relevant financial relationships.

This article was translated from the Medscape Portuguese edition. A version of this article appeared on Medscape.com.

Bacillus Calmette-Guérin (BCG) vaccines are given to more than 100 million children every year, but there is considerable debate regarding the effectiveness of BCG vaccination in preventing tuberculosis and death, particularly among older children and adults.

The most extensive study ever conducted on the efficacy of the BCG vaccine for protection against tuberculosis, stratified by age and history of previous tuberculosis, was published in September 2022 in The Lancet Global Health. The study, which comprises a systematic review and meta-analysis, analyzed individual-level data from 26 case-contact cohort studies published over the past 20 years. The studies included data from 70,000 participants. The primary outcome was a composite of prevalent (diagnosed at or within 90 days of baseline) and incident (diagnosed more than 90 days after baseline) tuberculosis in contacts exposed to tuberculosis. Secondary outcomes were pulmonary tuberculosis, extrapulmonary tuberculosis, and mortality.

Participants were characterized as having been exposed to tuberculosis if they were reported to have been a close contact (either living in the same household or having substantial interaction outside the household) of a person with microbiologically or radiologically diagnosed pulmonary tuberculosis. Previous tuberculosis was defined as a positive interferon-gamma (IFN-gamma) release assay or tuberculin skin test, also known as PPD or Mantoux test.

Most studies included in the analysis were conducted in the past 10 years in countries with a high tuberculosis burden. Those countries included India, South Africa, China, Vietnam, Indonesia, Uganda, the Gambia, and Brazil.
 

Primary outcomes

The study’s main findings included the following:

• The overall effectiveness of BCG vaccination against all forms of tuberculosis was 18% (adjusted odds ratio, 0.82; 95% CI, 0.74-0.91).
• Stratified by age, BCG vaccination only significantly protected against all tuberculosis in children younger than 5 years (aOR, 0.63; 95% CI, 0.49-0.81).
• There was no protective effect among those whose previous tests for tuberculosis were negative unless they were younger than 5 years (aOR, 0.54; 95% CI, 0.32-0.90).
• Among contacts who had a positive tuberculin skin test or IFN-gamma release assay, BCG vaccination significantly protected against tuberculosis among all participants (aOR, 0.81; 95% CI, 0.69-0.96), participants younger than 5 years (aOR, 0.68; 95% CI, 0.47-0.97), and participants aged 5-9 years (aOR, 0.62; 95% CI, 0.38-0.99).
• BCG vaccination was protective against pulmonary tuberculosis (19% effectiveness), but this effect was only seen in children younger than 3 years (42% effectiveness) when stratified by age.
• Protection against all tuberculosis and pulmonary tuberculosis was greater among female participants than male participants.

“This is a definitive BCG protection study because it involves a significant number of individuals evaluated using this meta-analysis. Protection is clearly lost with age. From as early as age 5, no protective effect can be observed. Protection, including against pulmonary tuberculosis, can be observed up to 3 years of age,” stated study author Julio Croda, MD, PhD, chair of the Brazilian Society of Tropical Medicine.

Dr. Croda emphasized that the findings from their study indicate that BCG vaccine protects against pulmonary tuberculosis and that those results differ from results of some previous studies.

“Every physician believes the BCG vaccine protects against serious forms of tuberculosis up to age 5. That fact is not surprising at all,” Dr. Croda remarked. “However, the fact that it protects against pulmonary tuberculosis, especially in children younger than 3, was surprising. In medical practice, we did not believe in this protection.”

Currently, 1.2% of new tuberculosis cases in Brazil occur among those younger than 5. Nevertheless, these cases represent 40.1% of new diagnoses recorded among those younger than 15, highlighting the importance of protection for this age group. An increase in extrapulmonary tuberculosis cases was recently observed in patients younger than 5.

Isabella Ballalai, MD, PhD, is deputy chair of the Brazilian Society of Immunizations. Although she did not participate in this study, she commented on its findings. “All publications are welcome; they help us think,” she explained. She emphasized that the BCG vaccine is not optimal. “There are studies indicating 80% efficacy and others indicating 0%. So, what we can look at is decades of effectiveness in practice.”

Dr. Ballalai explained that the BCG vaccine could keep severe forms of tuberculosis, meningitis, and miliary tuberculosis at bay. She shared her experience of caring for several patients with tuberculous meningitis shortly after she had graduated. “Today, thanks to the BCG vaccine, we don’t see it anymore.” However, she pointed out that the vaccine›s efficacy and effectiveness against pulmonary tuberculosis are low and that pulmonary tuberculosis remains the most significant problem among adults.

Dr. Ballalai also emphasized a few shortcomings of the study. “One is the definition of ‘vaccinated’ and ‘unvaccinated,’ which was based on the presence or absence of a mark on the arm. Today, we know that the absence of a mark does not indicate that the child has not been vaccinated, nor that the vaccine has not been effective. Therefore, several vaccinated participants may have been included amongst the unvaccinated participants.”

The authors emphasized that the definition of “vaccinated” and “unvaccinated” was based on a scar and on vaccination records, and they recognized that participants who did not have a scar on their arm could have been misclassified. Regardless, it is still considered a sensitive indicator. “Few vaccinated children from various settings do not show a scar years after vaccine administration,” they stated in their article.
 

Adults unprotected

Dr. Ballalai also shared her concerns regarding the lack of protection for older individuals. “We know those older than 60 are at greater risk for complications of tuberculosis. Individuals in this age group naturally have a lower immunity, and they usually have comorbidities. From this study, I can only conclude what was already expected: that adults who received a BCG vaccine as infants are not clear of pulmonary tuberculosis.”

Dr. Croda agreed that it was already evident that the BCG vaccine administered at birth did not provide protection for adults. “In the past, even with 80%-90% vaccine coverage, there were numerous tuberculosis cases in adults in Brazil.”
 

Are boosters needed?

The authors concluded that immunoprotection needs to be boosted in older populations, as vaccination at birth is ineffective for adolescents and adults. They have also discussed whether children older than 10 years and adults could benefit from a booster shot.

Dr. Croda emphasized that there is no indication for this, because there are no data regarding protection with a booster dose during adulthood. However, he cited a study conducted in South Africa in which the BCG vaccine was compared with another vaccine, and another study, which is being conducted in India, is assessing whether a BCG booster offers protection against pulmonary tuberculosis. “There are few studies. Perhaps the revaccination of more vulnerable groups could be of interest, but additional studies are needed first.”

Dr. Croda intends to assess revaccination in those deprived of liberty, in which the incidence of tuberculosis is very high. From 2015 to 2021, many new cases were recorded in this population in Brazil. The number rose from 5,860 to 6,773 during that period.

“However, BCG revaccination carries a significant risk of patients presenting with serious adverse events,” Dr. Ballalai pointed out. He noted that several years ago, to extend protection, Brazil adopted a booster program for persons aged 10 years or older, but the program was discontinued owing to the numerous adverse events reported and the absence of evidence of benefit from increased protection against tuberculosis.

“The adult groups at greater risk for severe tuberculosis manifestations normally presented with an underlying disease, particularly in immunocompromised patient groups. The [administration of the] BCG [vaccine] is contraindicated for those who are immunocompromised. And, for the older population, we do not have data on [vaccine] safety,” she emphasized.
 

Nonspecific immune protection

One of the study’s secondary outcomes regarded mortality. Four studies in the meta-analysis followed up tuberculosis contacts for death. In these studies, which evaluated 20,000 participants, BCG vaccination was shown to be significantly protective against death for participants younger than 15 years.

However, the authors urged caution in interpreting these data. They emphasized that they were unable to identify specific mechanisms by which BCG vaccination might have reduced mortality, and there are possible study biases that could have led to an overestimation of mortality benefit. Moreover, given the observational nature of the included studies, vaccinated children might have had higher socioeconomic status and greater access to health care, and they may have been more likely to have received other vaccinations, compared with children who did not receive BCG vaccines.

Nevertheless, previous experimental and observational studies have found that BCG vaccination might provide nonspecific or off-target immune protection against an array of other pathogens.

“In small studies conducted in Africa, those younger than 5 were protected not only against tuberculosis but also against other respiratory diseases,” Dr. Croda affirmed. “However, these are small studies, and for now, there is no recommendation for using BCG vaccination to prevent other respiratory infections.”

A long-awaited, critical study on the impact of the BCG vaccine on COVID-19, in which Brazilian researchers participated, will be published in the New England Journal of Medicine.
 

New vaccines needed

The BCG vaccine is one of the oldest vaccines, but there are still several crucial unanswered questions about its use.

Previously published studies that examined the protective effect of BCG vaccination only considered low-burden settings and the historical literature before 1950. These studies need updating, but doing so has not been a simple task. To answer their questions, individual-level participant data for a prespecified list of variables, including the characteristics of the exposed participant (contact), the index case, and the environment, were requested from authors of all eligible studies.

Much of the data used in the published research were found through discussions with authors and experts in the field, as well as through data deposited in data storage repositories, conference abstracts, dissertations, and even direct requests to the authors. “The Pan-American Health Organization helped with this data collection and contacting some authors,” said Dr. Croda.

With the new data, the authors confirmed that infant BCG vaccination, although important to young children who are at high risk for tuberculosis, does not prevent adult-type cavitary tuberculosis and is therefore insufficient to impede the tuberculosis epidemic. “Novel vaccines are urgently needed,” they concluded.

“We need to develop novel, more effective vaccines, which, when administered during infancy, would ensure lifelong protection,” Dr. Croda added.

Dr. Croda and Dr. Ballalai reported no relevant financial relationships.

This article was translated from the Medscape Portuguese edition. A version of this article appeared on Medscape.com.

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022 

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022 

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022