Covid ICYMI

COVID-19 was the third-leading cause of death in the United States in 2021 for the second straight year, with only heart disease and cancer causing more deaths, the Centers for Disease Control and Prevention said April 22.

About 693,000 people died of heart disease in 2021, with 605,000 dying of cancer and 415,000 of COVID, the CDC said, citing provisional data that might be updated later.

Unintentional injuries were the fourth-leading cause of death, increasing to 219,000 in 2021 from 201,000 in 2020. Influenza and pneumonia dropped out of the top 10 leading causes of death and suicide moved into 10th place.

Overall, about 3,458,697 deaths were reported in the United States in 2021. The age-adjusted death rate was 841.6 deaths per 100,000 people, an increase of 0.7% from 2020. The 2021 death rate was the highest since 2003, the CDC said.

The overall number of COVID deaths in 2021 increased around 20% over 2020, when around 384,000 people died from the virus, the CDC said. COVID deaths in 2021 peaked for the weeks ending Jan. 16 and Sept. 11, following holiday periods.

The demographics of COVID mortality changed slightly, the CDC said in a second report.

Blacks accounted for 13.3% of COVID deaths in 2021 and Hispanics 16.5%, down several percentage points from 2020, the CDC said. Asians made up 3.1% of COVID deaths for 2021, a drop from 3.6% in 2020. White people accounted for 65.2% of COVID deaths in 2021, an increase from 59.6% in 2020.

Non-Hispanic American Indian/Alaskan Native and non-Hispanic Black or African American had the highest overall death rates for COVID, the CDC said.

Breaking the data down by age, the number of COVID deaths among people aged 75 years and older dropped to 178,000 in 2021 from around 207,000 in 2020. The numbers went up in other age groups. Among people aged 65-75, about 101,000 died of COVID in 2021, up from around 76,000 in 2020.

“The results of both studies highlight the need for greater effort to implement effective interventions,” the CDC said in a statement. “We must work to ensure equal treatment in all communities in proportion to their need for effective interventions that can prevent excess COVID-19 deaths.”

Since the pandemic began, about 991,000 people in the United States have died from COVID-related causes, the most among all nations in the world.
 

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

COVID-19 was the third-leading cause of death in the United States in 2021 for the second straight year, with only heart disease and cancer causing more deaths, the Centers for Disease Control and Prevention said April 22.

About 693,000 people died of heart disease in 2021, with 605,000 dying of cancer and 415,000 of COVID, the CDC said, citing provisional data that might be updated later.

Unintentional injuries were the fourth-leading cause of death, increasing to 219,000 in 2021 from 201,000 in 2020. Influenza and pneumonia dropped out of the top 10 leading causes of death and suicide moved into 10th place.

Overall, about 3,458,697 deaths were reported in the United States in 2021. The age-adjusted death rate was 841.6 deaths per 100,000 people, an increase of 0.7% from 2020. The 2021 death rate was the highest since 2003, the CDC said.

The overall number of COVID deaths in 2021 increased around 20% over 2020, when around 384,000 people died from the virus, the CDC said. COVID deaths in 2021 peaked for the weeks ending Jan. 16 and Sept. 11, following holiday periods.

The demographics of COVID mortality changed slightly, the CDC said in a second report.

Blacks accounted for 13.3% of COVID deaths in 2021 and Hispanics 16.5%, down several percentage points from 2020, the CDC said. Asians made up 3.1% of COVID deaths for 2021, a drop from 3.6% in 2020. White people accounted for 65.2% of COVID deaths in 2021, an increase from 59.6% in 2020.

Non-Hispanic American Indian/Alaskan Native and non-Hispanic Black or African American had the highest overall death rates for COVID, the CDC said.

Breaking the data down by age, the number of COVID deaths among people aged 75 years and older dropped to 178,000 in 2021 from around 207,000 in 2020. The numbers went up in other age groups. Among people aged 65-75, about 101,000 died of COVID in 2021, up from around 76,000 in 2020.

“The results of both studies highlight the need for greater effort to implement effective interventions,” the CDC said in a statement. “We must work to ensure equal treatment in all communities in proportion to their need for effective interventions that can prevent excess COVID-19 deaths.”

Since the pandemic began, about 991,000 people in the United States have died from COVID-related causes, the most among all nations in the world.
 

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

COVID-19 was the third-leading cause of death in the United States in 2021 for the second straight year, with only heart disease and cancer causing more deaths, the Centers for Disease Control and Prevention said April 22.

About 693,000 people died of heart disease in 2021, with 605,000 dying of cancer and 415,000 of COVID, the CDC said, citing provisional data that might be updated later.

Unintentional injuries were the fourth-leading cause of death, increasing to 219,000 in 2021 from 201,000 in 2020. Influenza and pneumonia dropped out of the top 10 leading causes of death and suicide moved into 10th place.

Overall, about 3,458,697 deaths were reported in the United States in 2021. The age-adjusted death rate was 841.6 deaths per 100,000 people, an increase of 0.7% from 2020. The 2021 death rate was the highest since 2003, the CDC said.

The overall number of COVID deaths in 2021 increased around 20% over 2020, when around 384,000 people died from the virus, the CDC said. COVID deaths in 2021 peaked for the weeks ending Jan. 16 and Sept. 11, following holiday periods.

The demographics of COVID mortality changed slightly, the CDC said in a second report.

Blacks accounted for 13.3% of COVID deaths in 2021 and Hispanics 16.5%, down several percentage points from 2020, the CDC said. Asians made up 3.1% of COVID deaths for 2021, a drop from 3.6% in 2020. White people accounted for 65.2% of COVID deaths in 2021, an increase from 59.6% in 2020.

Non-Hispanic American Indian/Alaskan Native and non-Hispanic Black or African American had the highest overall death rates for COVID, the CDC said.

Breaking the data down by age, the number of COVID deaths among people aged 75 years and older dropped to 178,000 in 2021 from around 207,000 in 2020. The numbers went up in other age groups. Among people aged 65-75, about 101,000 died of COVID in 2021, up from around 76,000 in 2020.

“The results of both studies highlight the need for greater effort to implement effective interventions,” the CDC said in a statement. “We must work to ensure equal treatment in all communities in proportion to their need for effective interventions that can prevent excess COVID-19 deaths.”

Since the pandemic began, about 991,000 people in the United States have died from COVID-related causes, the most among all nations in the world.
 

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

One of the largest studies to date on myocarditis after COVID-19 vaccination confirms an increased risk with both the Pfizer and Moderna vaccines in young men and shows that the risk is higher with the Moderna than with the Pfizer vaccine.

The study also suggests for the first time that in young men 16 to 24 years of age, the risk for myocarditis after vaccination with either the Pfizer or Moderna vaccine is higher than the risk for myocarditis after COVID-19 infection.

The population-based study involved data on 23.1 million residents across four Scandinavian countries – Denmark, Finland, Norway, and Sweden – 74% of whom had received two vaccine doses and 7% of whom had received one dose.

By linking data from high-quality nationwide health registers on COVID-19 vaccination, infection rates, and myocarditis diagnoses, the researchers were able to evaluate the risk for myocarditis by vaccine product, vaccination dose number, sex, and age.

The study was published online in JAMA Cardiology.

The results confirm that the risk for myocarditis after COVID-19 mRNA vaccines is highest in young men 16 to 24 years of age after the second dose.

For men in this age group who received two doses of the same vaccine, data were compatible, with between four and seven excess myocarditis events in 28 days per 100,000 individuals after the second dose of the Pfizer vaccine, and between nine and 28 per 100,000 individuals after the second dose of the Moderna vaccine.

“This is one of the largest studies on this topic to date. The first population studies were in Israel, with 5 million individuals, and looked at just the Pfizer vaccine. We have data on 23 million people from Scandinavia that include both the Pfizer and Moderna vaccines,” senior author Rickard Ljung, MD, Swedish Medical Products Agency, told this news organization.

“We show a clearly higher risk of myocarditis after the Moderna vaccine than after the Pfizer vaccine. This has been suggested before, but our data confirm definitively that the Moderna vaccine has a higher risk of myocarditis than the Pfizer vaccine,” he added.

“In the group at highest risk of myocarditis after COVID vaccination – young men aged 16 to 24 – the Pfizer vaccine shows a five times higher risk of myocarditis versus the unvaccinated cohort, while the Moderna vaccine shows a 15 times higher risk,” Dr. Ljung noted.

After seeing these data, the Swedish regulatory authority is no longer recommending use of the Moderna vaccine for people younger than 30 years, Dr. Ljung said. Similar recommendations have been made in Norway and Finland.

The researchers report that their finding of a higher risk for myocarditis after the Moderna vaccine than after the Pfizer vaccine in young men is in line with data from the Canada, France, the United Kingdom, and the United States. But they point out that, compared with previous studies, the current study had the advantage of data analyzed according to a common protocol from four different countries and that showed similar directions of associations, despite considerable differences in previous COVID-19 infection levels and lockdown policies.

Risk higher with vaccination than infection?

For what is believed to be the first time, the Scandinavian data also suggest a higher risk for myocarditis after COVID-19 vaccination with both the Pfizer and Moderna vaccines than after COVID-19 infection in young men 16 to 24 years.

Although previous studies have shown that males in this age group have the highest risk for myocarditis after vaccination, it has always been suggested that the risk after vaccination is lower than the risk after infection. The Scandinavian data suggest otherwise for this age group.

Dr. Ljung explained that the myocarditis risk after COVID infection is very hard to study.

“It is highly dependent on the testing strategy,” he said. “For example, in the first half of 2020, the only people being tested were those admitted to hospital, so studies would have included the sickest patients and would therefore likely have found a higher rate of myocarditis. But this current Scandinavian dataset only included individuals with a positive COVID test after August 2020, reflecting a broader range of people.”

The researchers found an excess rate of myocarditis of 3.26 per 100,000 individuals within 28 days of a positive COVID-19 test among all males, and 1.37 per 100,000 individuals among males 16 to 24 years of age.

“We show that the risk of myocarditis after COVID infection is lower in younger people and higher in older people, but the opposite is true after COVID vaccination, where the risk of myocarditis is higher in younger people and lower in older people,” Dr. Ljung said.

The study was not able to look at severity of myocarditis but did record length of hospital stay, which was similar in patients who developed myocarditis after vaccination and those in the unvaccinated cohort (4 to 5 days). Deaths were rare, with no deaths in people younger than 40 years.

“I think we can say that in people aged over 40, the risk of myocarditis is greater with infection than with vaccination, but in those under 40, it is not so clear. And our data suggest that for young men aged 16 to 24 years, the risk of myocarditis after COVID vaccination with either the Pfizer or Moderna vaccine is higher than after COVID infection,” Dr. Ljung commented.

Although the Swedish regulatory agency has already stopped recommending use of Moderna vaccine in those younger than 30 years on the basis of these data, Dr. Ljung was reluctant to make any recommendations regarding the use of the Pfizer vaccine in young males, saying it was up to individual public-health agencies to makes these decisions. 

But he pointed out that the current study only looked at myocarditis, and COVID infection can result in many other complications that can lead to hospitalization and death, which needs to be taken into account when assessing the risk and benefit of vaccination.

Dr. Ljung noted that the current data only applied to the first two doses of the vaccines; data after booster injections have not been included, although the researchers are looking at that now.

What to advise patients?

In an accompanying Editor’s Note, Ann Marie Navar, MD, University of Texas Southwestern Medical Center, Dallas, who is editor of JAMA Cardiology, and Robert Bonow, MD, Northwestern University Feinberg School of Medicine, Chicago, who is deputy editor of JAMA Cardiology, try to explain how these data can inform the way health care professionals communicate with their patients about vaccination.

They point out the “good news,” that older adults who are at highest risk for COVID-19 complications appear to be at extremely low risk for vaccine-associated myocarditis.

They note that for both men and women older than 40 years, the excess number of cases of myocarditis after vaccination was fewer than two in 100,000 vaccinees across all vaccines studied, and the death toll from COVID-19 in the United States as of March was more than 200 per 100,000 population.

“Given the high rates of morbidity and mortality from COVID-19 infection in older adults and the efficacy of the vaccine in preventing severe infection and death, the benefits of immunization in those older than 40 years clearly outweigh the risks,” the editors say.

But given these data in young men, they suggest that health care professionals consider recommending the Pfizer vaccine over the Moderna vaccine for certain populations, including young men and other individuals for whom concerns about myocarditis present a barrier to immunization.

The editors also point out that although the risk for myocarditis after COVID-19 immunization is real, this low risk must be considered in the context of the overall benefit of the vaccine.

“At the individual level, immunization prevents not only COVID-19-related myocarditis but also severe disease, hospitalization, long-term complications after COVID-19 infection, and death. At the population level, immunization helps to decrease community spread, decrease the chances of new variants emerging, protect people who are immunocompromised, and ensure our health care system can continue to provide for our communities,” they conclude.

Dr. Ljung reports grants from Sanofi Aventis paid to his institution outside the submitted work and personal fees from Pfizer outside the submitted work. Dr. Navar reports personal fees from Pfizer and AstraZeneca, outside the scope of this work.

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

One of the largest studies to date on myocarditis after COVID-19 vaccination confirms an increased risk with both the Pfizer and Moderna vaccines in young men and shows that the risk is higher with the Moderna than with the Pfizer vaccine.

The study also suggests for the first time that in young men 16 to 24 years of age, the risk for myocarditis after vaccination with either the Pfizer or Moderna vaccine is higher than the risk for myocarditis after COVID-19 infection.

The population-based study involved data on 23.1 million residents across four Scandinavian countries – Denmark, Finland, Norway, and Sweden – 74% of whom had received two vaccine doses and 7% of whom had received one dose.

By linking data from high-quality nationwide health registers on COVID-19 vaccination, infection rates, and myocarditis diagnoses, the researchers were able to evaluate the risk for myocarditis by vaccine product, vaccination dose number, sex, and age.

The study was published online in JAMA Cardiology.

The results confirm that the risk for myocarditis after COVID-19 mRNA vaccines is highest in young men 16 to 24 years of age after the second dose.

For men in this age group who received two doses of the same vaccine, data were compatible, with between four and seven excess myocarditis events in 28 days per 100,000 individuals after the second dose of the Pfizer vaccine, and between nine and 28 per 100,000 individuals after the second dose of the Moderna vaccine.

“This is one of the largest studies on this topic to date. The first population studies were in Israel, with 5 million individuals, and looked at just the Pfizer vaccine. We have data on 23 million people from Scandinavia that include both the Pfizer and Moderna vaccines,” senior author Rickard Ljung, MD, Swedish Medical Products Agency, told this news organization.

“We show a clearly higher risk of myocarditis after the Moderna vaccine than after the Pfizer vaccine. This has been suggested before, but our data confirm definitively that the Moderna vaccine has a higher risk of myocarditis than the Pfizer vaccine,” he added.

“In the group at highest risk of myocarditis after COVID vaccination – young men aged 16 to 24 – the Pfizer vaccine shows a five times higher risk of myocarditis versus the unvaccinated cohort, while the Moderna vaccine shows a 15 times higher risk,” Dr. Ljung noted.

After seeing these data, the Swedish regulatory authority is no longer recommending use of the Moderna vaccine for people younger than 30 years, Dr. Ljung said. Similar recommendations have been made in Norway and Finland.

The researchers report that their finding of a higher risk for myocarditis after the Moderna vaccine than after the Pfizer vaccine in young men is in line with data from the Canada, France, the United Kingdom, and the United States. But they point out that, compared with previous studies, the current study had the advantage of data analyzed according to a common protocol from four different countries and that showed similar directions of associations, despite considerable differences in previous COVID-19 infection levels and lockdown policies.

Risk higher with vaccination than infection?

For what is believed to be the first time, the Scandinavian data also suggest a higher risk for myocarditis after COVID-19 vaccination with both the Pfizer and Moderna vaccines than after COVID-19 infection in young men 16 to 24 years.

Although previous studies have shown that males in this age group have the highest risk for myocarditis after vaccination, it has always been suggested that the risk after vaccination is lower than the risk after infection. The Scandinavian data suggest otherwise for this age group.

Dr. Ljung explained that the myocarditis risk after COVID infection is very hard to study.

“It is highly dependent on the testing strategy,” he said. “For example, in the first half of 2020, the only people being tested were those admitted to hospital, so studies would have included the sickest patients and would therefore likely have found a higher rate of myocarditis. But this current Scandinavian dataset only included individuals with a positive COVID test after August 2020, reflecting a broader range of people.”

The researchers found an excess rate of myocarditis of 3.26 per 100,000 individuals within 28 days of a positive COVID-19 test among all males, and 1.37 per 100,000 individuals among males 16 to 24 years of age.

“We show that the risk of myocarditis after COVID infection is lower in younger people and higher in older people, but the opposite is true after COVID vaccination, where the risk of myocarditis is higher in younger people and lower in older people,” Dr. Ljung said.

The study was not able to look at severity of myocarditis but did record length of hospital stay, which was similar in patients who developed myocarditis after vaccination and those in the unvaccinated cohort (4 to 5 days). Deaths were rare, with no deaths in people younger than 40 years.

“I think we can say that in people aged over 40, the risk of myocarditis is greater with infection than with vaccination, but in those under 40, it is not so clear. And our data suggest that for young men aged 16 to 24 years, the risk of myocarditis after COVID vaccination with either the Pfizer or Moderna vaccine is higher than after COVID infection,” Dr. Ljung commented.

Although the Swedish regulatory agency has already stopped recommending use of Moderna vaccine in those younger than 30 years on the basis of these data, Dr. Ljung was reluctant to make any recommendations regarding the use of the Pfizer vaccine in young males, saying it was up to individual public-health agencies to makes these decisions. 

But he pointed out that the current study only looked at myocarditis, and COVID infection can result in many other complications that can lead to hospitalization and death, which needs to be taken into account when assessing the risk and benefit of vaccination.

Dr. Ljung noted that the current data only applied to the first two doses of the vaccines; data after booster injections have not been included, although the researchers are looking at that now.

What to advise patients?

In an accompanying Editor’s Note, Ann Marie Navar, MD, University of Texas Southwestern Medical Center, Dallas, who is editor of JAMA Cardiology, and Robert Bonow, MD, Northwestern University Feinberg School of Medicine, Chicago, who is deputy editor of JAMA Cardiology, try to explain how these data can inform the way health care professionals communicate with their patients about vaccination.

They point out the “good news,” that older adults who are at highest risk for COVID-19 complications appear to be at extremely low risk for vaccine-associated myocarditis.

They note that for both men and women older than 40 years, the excess number of cases of myocarditis after vaccination was fewer than two in 100,000 vaccinees across all vaccines studied, and the death toll from COVID-19 in the United States as of March was more than 200 per 100,000 population.

“Given the high rates of morbidity and mortality from COVID-19 infection in older adults and the efficacy of the vaccine in preventing severe infection and death, the benefits of immunization in those older than 40 years clearly outweigh the risks,” the editors say.

But given these data in young men, they suggest that health care professionals consider recommending the Pfizer vaccine over the Moderna vaccine for certain populations, including young men and other individuals for whom concerns about myocarditis present a barrier to immunization.

The editors also point out that although the risk for myocarditis after COVID-19 immunization is real, this low risk must be considered in the context of the overall benefit of the vaccine.

“At the individual level, immunization prevents not only COVID-19-related myocarditis but also severe disease, hospitalization, long-term complications after COVID-19 infection, and death. At the population level, immunization helps to decrease community spread, decrease the chances of new variants emerging, protect people who are immunocompromised, and ensure our health care system can continue to provide for our communities,” they conclude.

Dr. Ljung reports grants from Sanofi Aventis paid to his institution outside the submitted work and personal fees from Pfizer outside the submitted work. Dr. Navar reports personal fees from Pfizer and AstraZeneca, outside the scope of this work.

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

One of the largest studies to date on myocarditis after COVID-19 vaccination confirms an increased risk with both the Pfizer and Moderna vaccines in young men and shows that the risk is higher with the Moderna than with the Pfizer vaccine.

The study also suggests for the first time that in young men 16 to 24 years of age, the risk for myocarditis after vaccination with either the Pfizer or Moderna vaccine is higher than the risk for myocarditis after COVID-19 infection.

The population-based study involved data on 23.1 million residents across four Scandinavian countries – Denmark, Finland, Norway, and Sweden – 74% of whom had received two vaccine doses and 7% of whom had received one dose.

By linking data from high-quality nationwide health registers on COVID-19 vaccination, infection rates, and myocarditis diagnoses, the researchers were able to evaluate the risk for myocarditis by vaccine product, vaccination dose number, sex, and age.

The study was published online in JAMA Cardiology.

The results confirm that the risk for myocarditis after COVID-19 mRNA vaccines is highest in young men 16 to 24 years of age after the second dose.

For men in this age group who received two doses of the same vaccine, data were compatible, with between four and seven excess myocarditis events in 28 days per 100,000 individuals after the second dose of the Pfizer vaccine, and between nine and 28 per 100,000 individuals after the second dose of the Moderna vaccine.

“This is one of the largest studies on this topic to date. The first population studies were in Israel, with 5 million individuals, and looked at just the Pfizer vaccine. We have data on 23 million people from Scandinavia that include both the Pfizer and Moderna vaccines,” senior author Rickard Ljung, MD, Swedish Medical Products Agency, told this news organization.

“We show a clearly higher risk of myocarditis after the Moderna vaccine than after the Pfizer vaccine. This has been suggested before, but our data confirm definitively that the Moderna vaccine has a higher risk of myocarditis than the Pfizer vaccine,” he added.

“In the group at highest risk of myocarditis after COVID vaccination – young men aged 16 to 24 – the Pfizer vaccine shows a five times higher risk of myocarditis versus the unvaccinated cohort, while the Moderna vaccine shows a 15 times higher risk,” Dr. Ljung noted.

After seeing these data, the Swedish regulatory authority is no longer recommending use of the Moderna vaccine for people younger than 30 years, Dr. Ljung said. Similar recommendations have been made in Norway and Finland.

The researchers report that their finding of a higher risk for myocarditis after the Moderna vaccine than after the Pfizer vaccine in young men is in line with data from the Canada, France, the United Kingdom, and the United States. But they point out that, compared with previous studies, the current study had the advantage of data analyzed according to a common protocol from four different countries and that showed similar directions of associations, despite considerable differences in previous COVID-19 infection levels and lockdown policies.

Risk higher with vaccination than infection?

For what is believed to be the first time, the Scandinavian data also suggest a higher risk for myocarditis after COVID-19 vaccination with both the Pfizer and Moderna vaccines than after COVID-19 infection in young men 16 to 24 years.

Although previous studies have shown that males in this age group have the highest risk for myocarditis after vaccination, it has always been suggested that the risk after vaccination is lower than the risk after infection. The Scandinavian data suggest otherwise for this age group.

Dr. Ljung explained that the myocarditis risk after COVID infection is very hard to study.

“It is highly dependent on the testing strategy,” he said. “For example, in the first half of 2020, the only people being tested were those admitted to hospital, so studies would have included the sickest patients and would therefore likely have found a higher rate of myocarditis. But this current Scandinavian dataset only included individuals with a positive COVID test after August 2020, reflecting a broader range of people.”

The researchers found an excess rate of myocarditis of 3.26 per 100,000 individuals within 28 days of a positive COVID-19 test among all males, and 1.37 per 100,000 individuals among males 16 to 24 years of age.

“We show that the risk of myocarditis after COVID infection is lower in younger people and higher in older people, but the opposite is true after COVID vaccination, where the risk of myocarditis is higher in younger people and lower in older people,” Dr. Ljung said.

The study was not able to look at severity of myocarditis but did record length of hospital stay, which was similar in patients who developed myocarditis after vaccination and those in the unvaccinated cohort (4 to 5 days). Deaths were rare, with no deaths in people younger than 40 years.

“I think we can say that in people aged over 40, the risk of myocarditis is greater with infection than with vaccination, but in those under 40, it is not so clear. And our data suggest that for young men aged 16 to 24 years, the risk of myocarditis after COVID vaccination with either the Pfizer or Moderna vaccine is higher than after COVID infection,” Dr. Ljung commented.

Although the Swedish regulatory agency has already stopped recommending use of Moderna vaccine in those younger than 30 years on the basis of these data, Dr. Ljung was reluctant to make any recommendations regarding the use of the Pfizer vaccine in young males, saying it was up to individual public-health agencies to makes these decisions. 

But he pointed out that the current study only looked at myocarditis, and COVID infection can result in many other complications that can lead to hospitalization and death, which needs to be taken into account when assessing the risk and benefit of vaccination.

Dr. Ljung noted that the current data only applied to the first two doses of the vaccines; data after booster injections have not been included, although the researchers are looking at that now.

What to advise patients?

In an accompanying Editor’s Note, Ann Marie Navar, MD, University of Texas Southwestern Medical Center, Dallas, who is editor of JAMA Cardiology, and Robert Bonow, MD, Northwestern University Feinberg School of Medicine, Chicago, who is deputy editor of JAMA Cardiology, try to explain how these data can inform the way health care professionals communicate with their patients about vaccination.

They point out the “good news,” that older adults who are at highest risk for COVID-19 complications appear to be at extremely low risk for vaccine-associated myocarditis.

They note that for both men and women older than 40 years, the excess number of cases of myocarditis after vaccination was fewer than two in 100,000 vaccinees across all vaccines studied, and the death toll from COVID-19 in the United States as of March was more than 200 per 100,000 population.

“Given the high rates of morbidity and mortality from COVID-19 infection in older adults and the efficacy of the vaccine in preventing severe infection and death, the benefits of immunization in those older than 40 years clearly outweigh the risks,” the editors say.

But given these data in young men, they suggest that health care professionals consider recommending the Pfizer vaccine over the Moderna vaccine for certain populations, including young men and other individuals for whom concerns about myocarditis present a barrier to immunization.

The editors also point out that although the risk for myocarditis after COVID-19 immunization is real, this low risk must be considered in the context of the overall benefit of the vaccine.

“At the individual level, immunization prevents not only COVID-19-related myocarditis but also severe disease, hospitalization, long-term complications after COVID-19 infection, and death. At the population level, immunization helps to decrease community spread, decrease the chances of new variants emerging, protect people who are immunocompromised, and ensure our health care system can continue to provide for our communities,” they conclude.

Dr. Ljung reports grants from Sanofi Aventis paid to his institution outside the submitted work and personal fees from Pfizer outside the submitted work. Dr. Navar reports personal fees from Pfizer and AstraZeneca, outside the scope of this work.

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

Approximately one-third of critical care workers reported some degree of depression, anxiety, or somatic symptoms in the early phase of the COVID-19 pandemic, based on survey results from 939 health care professionals.

The emotional response of professionals in a critical care setting in the early phase of the COVID-19 pandemic has not been well studied, Robyn Branca, PhD, and Paul Branca, MD, of Carson Newman University and the University of Tennessee Medical Center, both in Knoxville, wrote in an abstract presented at the virtual Critical Care Congress sponsored by the Society of Critical Care Medicine.

The prevalence of depression, anxiety, and somatization is low in the general population overall, but the researchers predicted that these conditions increased among workers in critical care settings early in the pandemic.

To assess the prevalence of psychological problems during that time, they sent an email survey on April 7, 2020, to members of the Society of Critical Care Medicine. The survey collected data on demographics, perceived caseload, and potential course of the pandemic. The survey also collected responses to assessments for depression (using the Patient Health Questionnaire–9), anxiety (using the Generalized Anxiety Disorder [GAD] Scale–7), and symptom somatization (using the PHQ-15).

Of the 939 survey respondents, 37% were male, 61.4% were female, and 1.4% gave another or no response.

Overall, 32.3% reported encountering 0-50 COVID-19 cases, 31.1% had encountered 51-200 cases, 12.5% had encountered 201-500 cases, 9.4% had encountered 501-1000 cases, and 13.7% had encountered more than 1,000 cases.

Based on the PHQ-9 depression scale, 44.9% of the respondents had minimal symptoms, 31.1% mild symptoms, 14.3% moderate symptoms, and 9.7% met criteria for severe depressive symptoms. Based on the GAD-7 anxiety scale, 35.5% had minimal symptoms, 32.9% mild, 16.8% moderate, and 14.8% had severe symptoms. Based on the PHQ-15 somatization scale, 39.6% of respondents showed minimal symptoms, whereas 38.2% showed mild symptoms, 17.3% moderate symptoms, and 4.9% had a severe degree of somatic symptoms.

The study findings were limited by the reliance on self-reports; however, the results indicate that a high percentage of critical care workers experienced significant, diagnosable levels of depression, anxiety, and somatic symptoms, the researchers said.

The standard guidance is to pursue individual intervention for anyone with scores of moderate or severe on the scales used in the survey, the researchers said.

Therefore, the findings represent “an alarming degree of mental health impact,” they emphasized. “Immediate mitigation efforts are needed to preserve the health of our ICU workforce.”

The study is important at this time because clinician fatigue and occupational stress are at endemic levels, Bernard Chang, MD, of Columbia University Irving Medical Center, New York City, said in an interview. “It is vital that we take stock of how frontline workers in critical care settings are doing overall,” said Dr. Chang.  

Dr. Chang, who was not involved with the study but has conducted research on mental health in frontline health care workers during the pandemic, said he was not surprised by the findings. “This work builds on the growing body of literature in the pandemic noting high levels of stress, fatigue, and depression/anxiety symptoms across many frontline workers, from emergency department staff, first responders and others. These are all data points highlighting the urgent need for a broad safety net, not only for patients but the providers serving them.”

The takeaway message: “Clinicians are often so focused on providing care for their patients that they may overlook the need to care for their own well-being and mental health,” said Dr. Chang.

As for additional research, “we need to now take this important data and build on creating and identifying tangible solutions to improve the morale of the acute care/health care workforce to ensure career longevity, professional satisfaction, and overall well-being,” Dr. Chang emphasized. Mental health and morale affect not only health care workers, but also the patients they care for. Well–cared for health care providers can be at their best to provide the optimal care for their patients.

The study received no outside funding. The researchers and Dr. Chang disclosed no relevant financial relationships.

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

Approximately one-third of critical care workers reported some degree of depression, anxiety, or somatic symptoms in the early phase of the COVID-19 pandemic, based on survey results from 939 health care professionals.

The emotional response of professionals in a critical care setting in the early phase of the COVID-19 pandemic has not been well studied, Robyn Branca, PhD, and Paul Branca, MD, of Carson Newman University and the University of Tennessee Medical Center, both in Knoxville, wrote in an abstract presented at the virtual Critical Care Congress sponsored by the Society of Critical Care Medicine.

The prevalence of depression, anxiety, and somatization is low in the general population overall, but the researchers predicted that these conditions increased among workers in critical care settings early in the pandemic.

To assess the prevalence of psychological problems during that time, they sent an email survey on April 7, 2020, to members of the Society of Critical Care Medicine. The survey collected data on demographics, perceived caseload, and potential course of the pandemic. The survey also collected responses to assessments for depression (using the Patient Health Questionnaire–9), anxiety (using the Generalized Anxiety Disorder [GAD] Scale–7), and symptom somatization (using the PHQ-15).

Of the 939 survey respondents, 37% were male, 61.4% were female, and 1.4% gave another or no response.

Overall, 32.3% reported encountering 0-50 COVID-19 cases, 31.1% had encountered 51-200 cases, 12.5% had encountered 201-500 cases, 9.4% had encountered 501-1000 cases, and 13.7% had encountered more than 1,000 cases.

Based on the PHQ-9 depression scale, 44.9% of the respondents had minimal symptoms, 31.1% mild symptoms, 14.3% moderate symptoms, and 9.7% met criteria for severe depressive symptoms. Based on the GAD-7 anxiety scale, 35.5% had minimal symptoms, 32.9% mild, 16.8% moderate, and 14.8% had severe symptoms. Based on the PHQ-15 somatization scale, 39.6% of respondents showed minimal symptoms, whereas 38.2% showed mild symptoms, 17.3% moderate symptoms, and 4.9% had a severe degree of somatic symptoms.

The study findings were limited by the reliance on self-reports; however, the results indicate that a high percentage of critical care workers experienced significant, diagnosable levels of depression, anxiety, and somatic symptoms, the researchers said.

The standard guidance is to pursue individual intervention for anyone with scores of moderate or severe on the scales used in the survey, the researchers said.

Therefore, the findings represent “an alarming degree of mental health impact,” they emphasized. “Immediate mitigation efforts are needed to preserve the health of our ICU workforce.”

The study is important at this time because clinician fatigue and occupational stress are at endemic levels, Bernard Chang, MD, of Columbia University Irving Medical Center, New York City, said in an interview. “It is vital that we take stock of how frontline workers in critical care settings are doing overall,” said Dr. Chang.  

Dr. Chang, who was not involved with the study but has conducted research on mental health in frontline health care workers during the pandemic, said he was not surprised by the findings. “This work builds on the growing body of literature in the pandemic noting high levels of stress, fatigue, and depression/anxiety symptoms across many frontline workers, from emergency department staff, first responders and others. These are all data points highlighting the urgent need for a broad safety net, not only for patients but the providers serving them.”

The takeaway message: “Clinicians are often so focused on providing care for their patients that they may overlook the need to care for their own well-being and mental health,” said Dr. Chang.

As for additional research, “we need to now take this important data and build on creating and identifying tangible solutions to improve the morale of the acute care/health care workforce to ensure career longevity, professional satisfaction, and overall well-being,” Dr. Chang emphasized. Mental health and morale affect not only health care workers, but also the patients they care for. Well–cared for health care providers can be at their best to provide the optimal care for their patients.

The study received no outside funding. The researchers and Dr. Chang disclosed no relevant financial relationships.

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

Approximately one-third of critical care workers reported some degree of depression, anxiety, or somatic symptoms in the early phase of the COVID-19 pandemic, based on survey results from 939 health care professionals.

The emotional response of professionals in a critical care setting in the early phase of the COVID-19 pandemic has not been well studied, Robyn Branca, PhD, and Paul Branca, MD, of Carson Newman University and the University of Tennessee Medical Center, both in Knoxville, wrote in an abstract presented at the virtual Critical Care Congress sponsored by the Society of Critical Care Medicine.

The prevalence of depression, anxiety, and somatization is low in the general population overall, but the researchers predicted that these conditions increased among workers in critical care settings early in the pandemic.

To assess the prevalence of psychological problems during that time, they sent an email survey on April 7, 2020, to members of the Society of Critical Care Medicine. The survey collected data on demographics, perceived caseload, and potential course of the pandemic. The survey also collected responses to assessments for depression (using the Patient Health Questionnaire–9), anxiety (using the Generalized Anxiety Disorder [GAD] Scale–7), and symptom somatization (using the PHQ-15).

Of the 939 survey respondents, 37% were male, 61.4% were female, and 1.4% gave another or no response.

Overall, 32.3% reported encountering 0-50 COVID-19 cases, 31.1% had encountered 51-200 cases, 12.5% had encountered 201-500 cases, 9.4% had encountered 501-1000 cases, and 13.7% had encountered more than 1,000 cases.

Based on the PHQ-9 depression scale, 44.9% of the respondents had minimal symptoms, 31.1% mild symptoms, 14.3% moderate symptoms, and 9.7% met criteria for severe depressive symptoms. Based on the GAD-7 anxiety scale, 35.5% had minimal symptoms, 32.9% mild, 16.8% moderate, and 14.8% had severe symptoms. Based on the PHQ-15 somatization scale, 39.6% of respondents showed minimal symptoms, whereas 38.2% showed mild symptoms, 17.3% moderate symptoms, and 4.9% had a severe degree of somatic symptoms.

The study findings were limited by the reliance on self-reports; however, the results indicate that a high percentage of critical care workers experienced significant, diagnosable levels of depression, anxiety, and somatic symptoms, the researchers said.

The standard guidance is to pursue individual intervention for anyone with scores of moderate or severe on the scales used in the survey, the researchers said.

Therefore, the findings represent “an alarming degree of mental health impact,” they emphasized. “Immediate mitigation efforts are needed to preserve the health of our ICU workforce.”

The study is important at this time because clinician fatigue and occupational stress are at endemic levels, Bernard Chang, MD, of Columbia University Irving Medical Center, New York City, said in an interview. “It is vital that we take stock of how frontline workers in critical care settings are doing overall,” said Dr. Chang.  

Dr. Chang, who was not involved with the study but has conducted research on mental health in frontline health care workers during the pandemic, said he was not surprised by the findings. “This work builds on the growing body of literature in the pandemic noting high levels of stress, fatigue, and depression/anxiety symptoms across many frontline workers, from emergency department staff, first responders and others. These are all data points highlighting the urgent need for a broad safety net, not only for patients but the providers serving them.”

The takeaway message: “Clinicians are often so focused on providing care for their patients that they may overlook the need to care for their own well-being and mental health,” said Dr. Chang.

As for additional research, “we need to now take this important data and build on creating and identifying tangible solutions to improve the morale of the acute care/health care workforce to ensure career longevity, professional satisfaction, and overall well-being,” Dr. Chang emphasized. Mental health and morale affect not only health care workers, but also the patients they care for. Well–cared for health care providers can be at their best to provide the optimal care for their patients.

The study received no outside funding. The researchers and Dr. Chang disclosed no relevant financial relationships.

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

Psychiatric disorders are tied to an increased risk of COVID-19 breakthrough infection, particularly among older adults, new research shows.

“Psychiatric disorders remained significantly associated with incident breakthrough infections above and beyond sociodemographic and medical factors, suggesting that mental health is important to consider in conjunction with other risk factors,” wrote the investigators, led by Aoife O’Donovan, PhD, University of California, San Francisco.

Individuals with psychiatric disorders “should be prioritized for booster vaccinations and other critical preventive efforts, including increased SARS-CoV-2 screening, public health campaigns, or COVID-19 discussions during clinical care,” they added.

The study was published online in JAMA Network Open.
 

Elderly most vulnerable

The researchers reviewed the records of 263,697 veterans who were fully vaccinated against COVID-19.

Just over a half (51.4%) had one or more psychiatric diagnoses within the last 5 years and 14.8% developed breakthrough COVID-19 infections, confirmed by a positive SARS-CoV-2 test.

Psychiatric diagnoses among the veterans included depression, posttraumatic stress, anxiety, adjustment disorder, substance use disorder, bipolar disorder, psychosis, ADHD, dissociation, and eating disorders.

In the overall sample, a history of any psychiatric disorder was associated with a 7% higher incidence of breakthrough COVID-19 infection in models adjusted for potential confounders (adjusted relative risk, 1.07; 95% confidence interval, 1.05-1.09) and a 3% higher incidence in models additionally adjusted for underlying medical comorbidities and smoking (aRR, 1.03; 95% CI, 1.01-1.05).

Most psychiatric disorders were associated with a higher incidence of breakthrough infection, with the highest relative risk observed for substance use disorders (aRR, 1.16; 95% CI, 1.12 -1.21) and adjustment disorder (aRR, 1.13; 95% CI, 1.10-1.16) in fully adjusted models.

Older vaccinated veterans with psychiatric illnesses appear to be most vulnerable to COVID-19 reinfection.

In veterans aged 65 and older, all psychiatric disorders were associated with an increased incidence of breakthrough infection, with increases in the incidence rate ranging from 3% to 24% in fully adjusted models.

In the younger veterans, in contrast, only anxiety, adjustment, and substance use disorders were associated with an increased incidence of breakthrough infection in fully adjusted models.

Psychotic disorders were associated with a 10% lower incidence of breakthrough infection among younger veterans, perhaps because of greater social isolation, the researchers said.
 

Risky behavior or impaired immunity?

“Although some of the larger observed effect sizes are compelling at an individual level, even the relatively modest effect sizes may have a large effect at the population level when considering the high prevalence of psychiatric disorders and the global reach and scale of the pandemic,” Dr. O’Donovan and colleagues wrote.

They noted that psychiatric disorders, including depression, schizophrenia, and bipolar disorders, have been associated with impaired cellular immunity and blunted response to vaccines. Therefore, it’s possible that those with psychiatric disorders have poorer responses to COVID-19 vaccination.

It’s also possible that immunity following vaccination wanes more quickly or more strongly in people with psychiatric disorders and they could have less protection against new variants, they added.

Patients with psychiatric disorders could be more apt to engage in risky behaviors for contracting COVID-19, which could also increase the risk for breakthrough infection, they said.

The study was supported by a UCSF Department of Psychiatry Rapid Award and UCSF Faculty Resource Fund Award. Dr. O’Donovan reported no relevant disclosures.

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

Psychiatric disorders are tied to an increased risk of COVID-19 breakthrough infection, particularly among older adults, new research shows.

“Psychiatric disorders remained significantly associated with incident breakthrough infections above and beyond sociodemographic and medical factors, suggesting that mental health is important to consider in conjunction with other risk factors,” wrote the investigators, led by Aoife O’Donovan, PhD, University of California, San Francisco.

Individuals with psychiatric disorders “should be prioritized for booster vaccinations and other critical preventive efforts, including increased SARS-CoV-2 screening, public health campaigns, or COVID-19 discussions during clinical care,” they added.

The study was published online in JAMA Network Open.
 

Elderly most vulnerable

The researchers reviewed the records of 263,697 veterans who were fully vaccinated against COVID-19.

Just over a half (51.4%) had one or more psychiatric diagnoses within the last 5 years and 14.8% developed breakthrough COVID-19 infections, confirmed by a positive SARS-CoV-2 test.

Psychiatric diagnoses among the veterans included depression, posttraumatic stress, anxiety, adjustment disorder, substance use disorder, bipolar disorder, psychosis, ADHD, dissociation, and eating disorders.

In the overall sample, a history of any psychiatric disorder was associated with a 7% higher incidence of breakthrough COVID-19 infection in models adjusted for potential confounders (adjusted relative risk, 1.07; 95% confidence interval, 1.05-1.09) and a 3% higher incidence in models additionally adjusted for underlying medical comorbidities and smoking (aRR, 1.03; 95% CI, 1.01-1.05).

Most psychiatric disorders were associated with a higher incidence of breakthrough infection, with the highest relative risk observed for substance use disorders (aRR, 1.16; 95% CI, 1.12 -1.21) and adjustment disorder (aRR, 1.13; 95% CI, 1.10-1.16) in fully adjusted models.

Older vaccinated veterans with psychiatric illnesses appear to be most vulnerable to COVID-19 reinfection.

In veterans aged 65 and older, all psychiatric disorders were associated with an increased incidence of breakthrough infection, with increases in the incidence rate ranging from 3% to 24% in fully adjusted models.

In the younger veterans, in contrast, only anxiety, adjustment, and substance use disorders were associated with an increased incidence of breakthrough infection in fully adjusted models.

Psychotic disorders were associated with a 10% lower incidence of breakthrough infection among younger veterans, perhaps because of greater social isolation, the researchers said.
 

Risky behavior or impaired immunity?

“Although some of the larger observed effect sizes are compelling at an individual level, even the relatively modest effect sizes may have a large effect at the population level when considering the high prevalence of psychiatric disorders and the global reach and scale of the pandemic,” Dr. O’Donovan and colleagues wrote.

They noted that psychiatric disorders, including depression, schizophrenia, and bipolar disorders, have been associated with impaired cellular immunity and blunted response to vaccines. Therefore, it’s possible that those with psychiatric disorders have poorer responses to COVID-19 vaccination.

It’s also possible that immunity following vaccination wanes more quickly or more strongly in people with psychiatric disorders and they could have less protection against new variants, they added.

Patients with psychiatric disorders could be more apt to engage in risky behaviors for contracting COVID-19, which could also increase the risk for breakthrough infection, they said.

The study was supported by a UCSF Department of Psychiatry Rapid Award and UCSF Faculty Resource Fund Award. Dr. O’Donovan reported no relevant disclosures.

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

Psychiatric disorders are tied to an increased risk of COVID-19 breakthrough infection, particularly among older adults, new research shows.

“Psychiatric disorders remained significantly associated with incident breakthrough infections above and beyond sociodemographic and medical factors, suggesting that mental health is important to consider in conjunction with other risk factors,” wrote the investigators, led by Aoife O’Donovan, PhD, University of California, San Francisco.

Individuals with psychiatric disorders “should be prioritized for booster vaccinations and other critical preventive efforts, including increased SARS-CoV-2 screening, public health campaigns, or COVID-19 discussions during clinical care,” they added.

The study was published online in JAMA Network Open.
 

Elderly most vulnerable

The researchers reviewed the records of 263,697 veterans who were fully vaccinated against COVID-19.

Just over a half (51.4%) had one or more psychiatric diagnoses within the last 5 years and 14.8% developed breakthrough COVID-19 infections, confirmed by a positive SARS-CoV-2 test.

Psychiatric diagnoses among the veterans included depression, posttraumatic stress, anxiety, adjustment disorder, substance use disorder, bipolar disorder, psychosis, ADHD, dissociation, and eating disorders.

In the overall sample, a history of any psychiatric disorder was associated with a 7% higher incidence of breakthrough COVID-19 infection in models adjusted for potential confounders (adjusted relative risk, 1.07; 95% confidence interval, 1.05-1.09) and a 3% higher incidence in models additionally adjusted for underlying medical comorbidities and smoking (aRR, 1.03; 95% CI, 1.01-1.05).

Most psychiatric disorders were associated with a higher incidence of breakthrough infection, with the highest relative risk observed for substance use disorders (aRR, 1.16; 95% CI, 1.12 -1.21) and adjustment disorder (aRR, 1.13; 95% CI, 1.10-1.16) in fully adjusted models.

Older vaccinated veterans with psychiatric illnesses appear to be most vulnerable to COVID-19 reinfection.

In veterans aged 65 and older, all psychiatric disorders were associated with an increased incidence of breakthrough infection, with increases in the incidence rate ranging from 3% to 24% in fully adjusted models.

In the younger veterans, in contrast, only anxiety, adjustment, and substance use disorders were associated with an increased incidence of breakthrough infection in fully adjusted models.

Psychotic disorders were associated with a 10% lower incidence of breakthrough infection among younger veterans, perhaps because of greater social isolation, the researchers said.
 

Risky behavior or impaired immunity?

“Although some of the larger observed effect sizes are compelling at an individual level, even the relatively modest effect sizes may have a large effect at the population level when considering the high prevalence of psychiatric disorders and the global reach and scale of the pandemic,” Dr. O’Donovan and colleagues wrote.

They noted that psychiatric disorders, including depression, schizophrenia, and bipolar disorders, have been associated with impaired cellular immunity and blunted response to vaccines. Therefore, it’s possible that those with psychiatric disorders have poorer responses to COVID-19 vaccination.

It’s also possible that immunity following vaccination wanes more quickly or more strongly in people with psychiatric disorders and they could have less protection against new variants, they added.

Patients with psychiatric disorders could be more apt to engage in risky behaviors for contracting COVID-19, which could also increase the risk for breakthrough infection, they said.

The study was supported by a UCSF Department of Psychiatry Rapid Award and UCSF Faculty Resource Fund Award. Dr. O’Donovan reported no relevant disclosures.

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

The Centers for Disease Control and Prevention is considering what to tell the public about second booster shots with mRNA vaccinations for COVID-19.

The U.S. Food and Drug Administration in March authorized a second booster dose of either the Pfizer-BioNTech or the Moderna COVID-19 vaccines for people aged 50 and older and certain immunocompromised adults, even though many top infectious disease experts questioned the need before the agency’s decision.

In a meeting April 20, the CDC asked its Advisory Committee on Immunization Practices to discuss second booster shots, but did not ask the group of experts to vote on formal recommendations.

Instead, the experts talked about the potential timing of additional COVID-19 vaccines for those who already have had three shots, and challenges for vaccination efforts that likely will arise as the pandemic persists.

ACIP member Beth Bell, MD, MPH, of the University of Washington, Seattle, said she’s concerned about the potential for “booster fatigue.”

“A vaccination program that’s going to require boosting large proportions of the population every 4-6 months is really not sustainable and probably not something that most people want to participate in,” she said.

The benefit of additional COVID-19 shots for now appears to be smaller than what people get from the initial doses, Dr. Bell said.

Earlier in the meeting, CDC staff presented estimates about how well the COVID-19 vaccines work to prevent one case of hospitalization from the disease over 4 months among people aged 50 and older.

The major gain in preventing hospitalizations occurs with the first vaccination series and then wanes, the CDC said.

It appears that one hospitalization is prevented for every 135 people who get the first round of COVID-19 vaccinations. But it takes 674 people getting a first booster dose to prevent one hospitalization. A second booster prevents one hospitalization for every 1,205 people vaccinated.

Dr. Bell said she’s concerned about considering additional doses for “smaller and smaller return and creating an impression that we don’t have a very effective vaccination program,” even though the CDC’s data show a clear benefit.
 

Reasons to get a second booster

Elisha Hall, PhD, RD, of the CDC presented slides with some factors to help determine the urgency for a person to get a second booster:

• Having certain underlying medical conditions that increase the risk of severe COVID-19 illness.
• Being moderately or severely immunocompromised.
• Living with someone who is immunocompromised, at increased risk for severe disease, or who cannot be vaccinated because of age or contraindication.
• Being at increased risk of exposure to SARS-CoV-2, the virus that causes COVID-19, such as through occupational, institutional, or other activities (e.g., travel or large gatherings).
• Living or working in an area where there is a medium or high level of COVID-19 in the community.

In contrast, people might want to wait if they had been infected with SARS-CoV-2 within the past 3 months, Dr. Hall said in her presentation. Another reason for delay might be a concern that a booster dose may be more important later in the year.

The experts also addressed public confusion over boosters. For the Pfizer and Moderna mRNA vaccines, a second booster is a fourth dose, but for those who received the one-shot J&J vaccine, the second booster is a third dose.

Going forward, it may be easier to refer to subsequent doses as “annual boosters,” the CDC’s Sara Oliver, MD, MSPH, told the panel. It will be important to keep language about subsequent vaccinations clear and easy for the public to follow, she said.

Dr. Oliver also said there’s already been a drop-off in the acceptance of second rounds of COVID-19 vaccinations. CDC data show that 77% of people in the United States have had at least one dose of a COVID-19 vaccine, but only 66% of the population is fully vaccinated, and only 45% have had a first booster dose.

In her presentation, Dr. Oliver said the top priority in COVID-19 vaccination efforts remains initial vaccinations for people who haven’t gotten them.
 

Kids younger than 5

During the public comment session of the CDC meeting, several people called on the FDA to move quickly to expand authorization of COVID-19 vaccines to children aged 5 years and younger.

“We know that many parents and caregivers and health care providers are anxious to have COVID vaccines available” for young children, said Doran Fink, MD, PhD, a deputy director of the FDA’s vaccines division.

He said the agency is working to be ready to authorize the shots for young children while it awaits research results from the manufacturers.

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

The Centers for Disease Control and Prevention is considering what to tell the public about second booster shots with mRNA vaccinations for COVID-19.

The U.S. Food and Drug Administration in March authorized a second booster dose of either the Pfizer-BioNTech or the Moderna COVID-19 vaccines for people aged 50 and older and certain immunocompromised adults, even though many top infectious disease experts questioned the need before the agency’s decision.

In a meeting April 20, the CDC asked its Advisory Committee on Immunization Practices to discuss second booster shots, but did not ask the group of experts to vote on formal recommendations.

Instead, the experts talked about the potential timing of additional COVID-19 vaccines for those who already have had three shots, and challenges for vaccination efforts that likely will arise as the pandemic persists.

ACIP member Beth Bell, MD, MPH, of the University of Washington, Seattle, said she’s concerned about the potential for “booster fatigue.”

“A vaccination program that’s going to require boosting large proportions of the population every 4-6 months is really not sustainable and probably not something that most people want to participate in,” she said.

The benefit of additional COVID-19 shots for now appears to be smaller than what people get from the initial doses, Dr. Bell said.

Earlier in the meeting, CDC staff presented estimates about how well the COVID-19 vaccines work to prevent one case of hospitalization from the disease over 4 months among people aged 50 and older.

The major gain in preventing hospitalizations occurs with the first vaccination series and then wanes, the CDC said.

It appears that one hospitalization is prevented for every 135 people who get the first round of COVID-19 vaccinations. But it takes 674 people getting a first booster dose to prevent one hospitalization. A second booster prevents one hospitalization for every 1,205 people vaccinated.

Dr. Bell said she’s concerned about considering additional doses for “smaller and smaller return and creating an impression that we don’t have a very effective vaccination program,” even though the CDC’s data show a clear benefit.
 

Reasons to get a second booster

Elisha Hall, PhD, RD, of the CDC presented slides with some factors to help determine the urgency for a person to get a second booster:

• Having certain underlying medical conditions that increase the risk of severe COVID-19 illness.
• Being moderately or severely immunocompromised.
• Living with someone who is immunocompromised, at increased risk for severe disease, or who cannot be vaccinated because of age or contraindication.
• Being at increased risk of exposure to SARS-CoV-2, the virus that causes COVID-19, such as through occupational, institutional, or other activities (e.g., travel or large gatherings).
• Living or working in an area where there is a medium or high level of COVID-19 in the community.

In contrast, people might want to wait if they had been infected with SARS-CoV-2 within the past 3 months, Dr. Hall said in her presentation. Another reason for delay might be a concern that a booster dose may be more important later in the year.

The experts also addressed public confusion over boosters. For the Pfizer and Moderna mRNA vaccines, a second booster is a fourth dose, but for those who received the one-shot J&J vaccine, the second booster is a third dose.

Going forward, it may be easier to refer to subsequent doses as “annual boosters,” the CDC’s Sara Oliver, MD, MSPH, told the panel. It will be important to keep language about subsequent vaccinations clear and easy for the public to follow, she said.

Dr. Oliver also said there’s already been a drop-off in the acceptance of second rounds of COVID-19 vaccinations. CDC data show that 77% of people in the United States have had at least one dose of a COVID-19 vaccine, but only 66% of the population is fully vaccinated, and only 45% have had a first booster dose.

In her presentation, Dr. Oliver said the top priority in COVID-19 vaccination efforts remains initial vaccinations for people who haven’t gotten them.
 

Kids younger than 5

During the public comment session of the CDC meeting, several people called on the FDA to move quickly to expand authorization of COVID-19 vaccines to children aged 5 years and younger.

“We know that many parents and caregivers and health care providers are anxious to have COVID vaccines available” for young children, said Doran Fink, MD, PhD, a deputy director of the FDA’s vaccines division.

He said the agency is working to be ready to authorize the shots for young children while it awaits research results from the manufacturers.

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

The Centers for Disease Control and Prevention is considering what to tell the public about second booster shots with mRNA vaccinations for COVID-19.

The U.S. Food and Drug Administration in March authorized a second booster dose of either the Pfizer-BioNTech or the Moderna COVID-19 vaccines for people aged 50 and older and certain immunocompromised adults, even though many top infectious disease experts questioned the need before the agency’s decision.

In a meeting April 20, the CDC asked its Advisory Committee on Immunization Practices to discuss second booster shots, but did not ask the group of experts to vote on formal recommendations.

Instead, the experts talked about the potential timing of additional COVID-19 vaccines for those who already have had three shots, and challenges for vaccination efforts that likely will arise as the pandemic persists.

ACIP member Beth Bell, MD, MPH, of the University of Washington, Seattle, said she’s concerned about the potential for “booster fatigue.”

“A vaccination program that’s going to require boosting large proportions of the population every 4-6 months is really not sustainable and probably not something that most people want to participate in,” she said.

The benefit of additional COVID-19 shots for now appears to be smaller than what people get from the initial doses, Dr. Bell said.

Earlier in the meeting, CDC staff presented estimates about how well the COVID-19 vaccines work to prevent one case of hospitalization from the disease over 4 months among people aged 50 and older.

The major gain in preventing hospitalizations occurs with the first vaccination series and then wanes, the CDC said.

It appears that one hospitalization is prevented for every 135 people who get the first round of COVID-19 vaccinations. But it takes 674 people getting a first booster dose to prevent one hospitalization. A second booster prevents one hospitalization for every 1,205 people vaccinated.

Dr. Bell said she’s concerned about considering additional doses for “smaller and smaller return and creating an impression that we don’t have a very effective vaccination program,” even though the CDC’s data show a clear benefit.
 

Reasons to get a second booster

Elisha Hall, PhD, RD, of the CDC presented slides with some factors to help determine the urgency for a person to get a second booster:

• Having certain underlying medical conditions that increase the risk of severe COVID-19 illness.
• Being moderately or severely immunocompromised.
• Living with someone who is immunocompromised, at increased risk for severe disease, or who cannot be vaccinated because of age or contraindication.
• Being at increased risk of exposure to SARS-CoV-2, the virus that causes COVID-19, such as through occupational, institutional, or other activities (e.g., travel or large gatherings).
• Living or working in an area where there is a medium or high level of COVID-19 in the community.

In contrast, people might want to wait if they had been infected with SARS-CoV-2 within the past 3 months, Dr. Hall said in her presentation. Another reason for delay might be a concern that a booster dose may be more important later in the year.

The experts also addressed public confusion over boosters. For the Pfizer and Moderna mRNA vaccines, a second booster is a fourth dose, but for those who received the one-shot J&J vaccine, the second booster is a third dose.

Going forward, it may be easier to refer to subsequent doses as “annual boosters,” the CDC’s Sara Oliver, MD, MSPH, told the panel. It will be important to keep language about subsequent vaccinations clear and easy for the public to follow, she said.

Dr. Oliver also said there’s already been a drop-off in the acceptance of second rounds of COVID-19 vaccinations. CDC data show that 77% of people in the United States have had at least one dose of a COVID-19 vaccine, but only 66% of the population is fully vaccinated, and only 45% have had a first booster dose.

In her presentation, Dr. Oliver said the top priority in COVID-19 vaccination efforts remains initial vaccinations for people who haven’t gotten them.
 

Kids younger than 5

During the public comment session of the CDC meeting, several people called on the FDA to move quickly to expand authorization of COVID-19 vaccines to children aged 5 years and younger.

“We know that many parents and caregivers and health care providers are anxious to have COVID vaccines available” for young children, said Doran Fink, MD, PhD, a deputy director of the FDA’s vaccines division.

He said the agency is working to be ready to authorize the shots for young children while it awaits research results from the manufacturers.

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

About 30% of COVID-19 patients developed the condition known as long COVID, University of California, Los Angeles, researchers said in a study published in the Journal of General Internal Medicine.

The UCLA researchers studied 1,038 people enrolled in the UCLA COVID Ambulatory Program between April 2020 and February 2021 and found that 309 developed long COVID.

A long-COVID diagnosis came if a patient answering a questionnaire reported persistent symptoms 60-90 days after they were infected or hospitalized. The most persistent symptoms were fatigue (31%) and shortness of breath (15%) in hospitalized participants. Among outpatients, 16% reported losing sense of smell.

The study’s findings differ from earlier research. The University of California, Davis, for example, estimated that 10% of COVID-19 patients develop long-haul symptoms. A 2021 study from Penn State University found that more than half of worldwide COVID-19 patients would develop long COVID.

Part of the discrepancy can blamed on the fact there is no official, widely accepted definition of long COVID. The Centers for Disease Control and Prevention has said it means patients who experience “new, returning, or ongoing health problems 4 or more weeks after an initial infection” the coronavirus. The UCLA study, meanwhile, included patients still having symptoms 60-90 days after infection.

Still, the UCLA research team looked at demographics and clinical characteristics in an attempt to develop effective treatments.

People with a history of hospitalization, diabetes, and higher body mass index were most likely to develop long COVID, the researchers said. The kind of insurance the patients had also seemed to be a factor, though the researchers didn’t offer a reason why.

“Surprisingly, patients with commercial insurance had double the likelihood of developing [long COVID] compared to patients with Medicaid,” they wrote. “This association will be important to explore further to understand if insurance status in this group is representing unmeasured demographic factors or exposures.”

Older age and socioeconomic status were not associated with long COVID in the study – a surprise because those characteristics are often linked with severe illness and higher risk of death from COVID-19.

Weaknesses in the study included the subjective nature of how patients rated their symptoms and the limited number of symptoms evaluated.

“This study illustrates the need to follow diverse patient populations ... to understand the long COVID disease trajectory and evaluate how individual factors such as preexisting comorbidities, sociodemographic factors, vaccination status and virus variant type affect type and persistence of long COVID symptoms,” said Sun Yoo, MD, health sciences assistant clinical professor at UCLA.

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

About 30% of COVID-19 patients developed the condition known as long COVID, University of California, Los Angeles, researchers said in a study published in the Journal of General Internal Medicine.

The UCLA researchers studied 1,038 people enrolled in the UCLA COVID Ambulatory Program between April 2020 and February 2021 and found that 309 developed long COVID.

A long-COVID diagnosis came if a patient answering a questionnaire reported persistent symptoms 60-90 days after they were infected or hospitalized. The most persistent symptoms were fatigue (31%) and shortness of breath (15%) in hospitalized participants. Among outpatients, 16% reported losing sense of smell.

The study’s findings differ from earlier research. The University of California, Davis, for example, estimated that 10% of COVID-19 patients develop long-haul symptoms. A 2021 study from Penn State University found that more than half of worldwide COVID-19 patients would develop long COVID.

Part of the discrepancy can blamed on the fact there is no official, widely accepted definition of long COVID. The Centers for Disease Control and Prevention has said it means patients who experience “new, returning, or ongoing health problems 4 or more weeks after an initial infection” the coronavirus. The UCLA study, meanwhile, included patients still having symptoms 60-90 days after infection.

Still, the UCLA research team looked at demographics and clinical characteristics in an attempt to develop effective treatments.

People with a history of hospitalization, diabetes, and higher body mass index were most likely to develop long COVID, the researchers said. The kind of insurance the patients had also seemed to be a factor, though the researchers didn’t offer a reason why.

“Surprisingly, patients with commercial insurance had double the likelihood of developing [long COVID] compared to patients with Medicaid,” they wrote. “This association will be important to explore further to understand if insurance status in this group is representing unmeasured demographic factors or exposures.”

Older age and socioeconomic status were not associated with long COVID in the study – a surprise because those characteristics are often linked with severe illness and higher risk of death from COVID-19.

Weaknesses in the study included the subjective nature of how patients rated their symptoms and the limited number of symptoms evaluated.

“This study illustrates the need to follow diverse patient populations ... to understand the long COVID disease trajectory and evaluate how individual factors such as preexisting comorbidities, sociodemographic factors, vaccination status and virus variant type affect type and persistence of long COVID symptoms,” said Sun Yoo, MD, health sciences assistant clinical professor at UCLA.

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

About 30% of COVID-19 patients developed the condition known as long COVID, University of California, Los Angeles, researchers said in a study published in the Journal of General Internal Medicine.

The UCLA researchers studied 1,038 people enrolled in the UCLA COVID Ambulatory Program between April 2020 and February 2021 and found that 309 developed long COVID.

A long-COVID diagnosis came if a patient answering a questionnaire reported persistent symptoms 60-90 days after they were infected or hospitalized. The most persistent symptoms were fatigue (31%) and shortness of breath (15%) in hospitalized participants. Among outpatients, 16% reported losing sense of smell.

The study’s findings differ from earlier research. The University of California, Davis, for example, estimated that 10% of COVID-19 patients develop long-haul symptoms. A 2021 study from Penn State University found that more than half of worldwide COVID-19 patients would develop long COVID.

Part of the discrepancy can blamed on the fact there is no official, widely accepted definition of long COVID. The Centers for Disease Control and Prevention has said it means patients who experience “new, returning, or ongoing health problems 4 or more weeks after an initial infection” the coronavirus. The UCLA study, meanwhile, included patients still having symptoms 60-90 days after infection.

Still, the UCLA research team looked at demographics and clinical characteristics in an attempt to develop effective treatments.

People with a history of hospitalization, diabetes, and higher body mass index were most likely to develop long COVID, the researchers said. The kind of insurance the patients had also seemed to be a factor, though the researchers didn’t offer a reason why.

“Surprisingly, patients with commercial insurance had double the likelihood of developing [long COVID] compared to patients with Medicaid,” they wrote. “This association will be important to explore further to understand if insurance status in this group is representing unmeasured demographic factors or exposures.”

Older age and socioeconomic status were not associated with long COVID in the study – a surprise because those characteristics are often linked with severe illness and higher risk of death from COVID-19.

Weaknesses in the study included the subjective nature of how patients rated their symptoms and the limited number of symptoms evaluated.

“This study illustrates the need to follow diverse patient populations ... to understand the long COVID disease trajectory and evaluate how individual factors such as preexisting comorbidities, sociodemographic factors, vaccination status and virus variant type affect type and persistence of long COVID symptoms,” said Sun Yoo, MD, health sciences assistant clinical professor at UCLA.

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

Peripheral muscle fatigue was the most common cause of exercise limitation in patients recovered from COVID-19 regardless of disease severity, in a study of nearly 300 individuals.

The source and magnitude of exercise intolerance in post–COVID-19 patients has not been well studied, said Mauricio Milani, MD, of Fitcordis Exercise Medicine Clinic, Brasilia, Brazil, in a presentation at the annual congress of the European Association of Preventive Cardiology.

Midas Anim/Shutterstock

To assess exercise intolerance, the researchers performed cardiopulmonary exercise testing (CPET) on 144 adults who had recovered from COVID-19 and 144 matched controls who had not had COVID-19. The average age of the participants was 43 years, and 57% were male. COVID-19 was defined as mild, moderate, or severe in 60%, 21%, and 19% of the cases, respectively.

Residual symptoms were present in 41% of cases. CPET was performed at roughly 14 weeks after disease onset.

Among the COVID-19 patients, most of the CPET limitations (92%) were caused by muscle fatigue; cardiovascular limitations were noted in 2%, and pulmonary limitations were noted in 6%.

Data from the post-COVID CPET showed differences in peak oxygen consumption, as well as the first and second ventilatory thresholds (VT1 and VT2) between COVID-19 patients and controls, and with lower values related to higher illness severities, Dr. Milani said. Heart rate also varied according to illness severity, with lower values significantly related to higher illness severities and significant differences between COVID patients and controls.

A total of 42 individuals with COVID-19 had previous CPET data for comparison (27 with mild disease and 15 with moderate or severe disease), Dr. Milani said. In the subgroup with mild disease, the only significant difference in CPET results before and after COVID-19 was peak speed. In the moderate/severe group, the researchers observed higher reductions in peak speed and also reductions in oxygen consumption at peak and thresholds.

However, peak oxygen flows were not different before and after COVID-19 in either the mild or moderate/severe subgroups, Dr. Milani said.

The study findings were limited in part by the relatively small study population; however, the results indicate that peripheral muscle fatigue is the primary etiology in exercise limitation in post–COVID-19 patients.

“Our data suggest that treatment should emphasize comprehensive rehabilitation programs, including aerobic and muscle strengthening components,” Dr. Milani concluded.

COVID challenges remain unclear

“After COVID, patients often display a postviral syndrome with a wide range of symptoms,” Matthew Martinez, MD, a sports cardiologist at the Atlantic Health System in Morristown, N.J., in an interview said. “These conditions frequently lead to a sense of tiredness and weakness, pain, difficulty concentrating, and headaches that linger after the viral infection has cleared,” and these symptoms may continue for weeks.

However, this scenario is not unique to COVID-19: “This study confirms the importance of muscle fatigue in recovery,” said Dr. Martinez. “Recovery from viral illness requires hydration, sleep and slow progression return to exercise.” Consequently, Dr. Martinez said he was not surprised by the current study findings.

The take-home message for clinicians is to be aware that COVID-19 can have postviral syndrome, as is common after other infections, Dr. Martinez noted. The findings provide a starting point for discussing concerns with patients and explaining that a slow return to normal with usual care is expected. “Time to recovery will vary by individual,” he said. “Additional research is needed to identify which specific therapies are most important to help reduce time to recovery, and what new therapies could be developed to help facilitate muscle fatigue recovery and reduce time needed to recover.”

The study was supported by CAPES and CNPq. Dr. Milani had no financial conflicts to disclose. Dr. Martinez had no financial conflicts to disclose.

Peripheral muscle fatigue was the most common cause of exercise limitation in patients recovered from COVID-19 regardless of disease severity, in a study of nearly 300 individuals.

The source and magnitude of exercise intolerance in post–COVID-19 patients has not been well studied, said Mauricio Milani, MD, of Fitcordis Exercise Medicine Clinic, Brasilia, Brazil, in a presentation at the annual congress of the European Association of Preventive Cardiology.

Midas Anim/Shutterstock

To assess exercise intolerance, the researchers performed cardiopulmonary exercise testing (CPET) on 144 adults who had recovered from COVID-19 and 144 matched controls who had not had COVID-19. The average age of the participants was 43 years, and 57% were male. COVID-19 was defined as mild, moderate, or severe in 60%, 21%, and 19% of the cases, respectively.

Residual symptoms were present in 41% of cases. CPET was performed at roughly 14 weeks after disease onset.

Among the COVID-19 patients, most of the CPET limitations (92%) were caused by muscle fatigue; cardiovascular limitations were noted in 2%, and pulmonary limitations were noted in 6%.

Data from the post-COVID CPET showed differences in peak oxygen consumption, as well as the first and second ventilatory thresholds (VT1 and VT2) between COVID-19 patients and controls, and with lower values related to higher illness severities, Dr. Milani said. Heart rate also varied according to illness severity, with lower values significantly related to higher illness severities and significant differences between COVID patients and controls.

A total of 42 individuals with COVID-19 had previous CPET data for comparison (27 with mild disease and 15 with moderate or severe disease), Dr. Milani said. In the subgroup with mild disease, the only significant difference in CPET results before and after COVID-19 was peak speed. In the moderate/severe group, the researchers observed higher reductions in peak speed and also reductions in oxygen consumption at peak and thresholds.

However, peak oxygen flows were not different before and after COVID-19 in either the mild or moderate/severe subgroups, Dr. Milani said.

The study findings were limited in part by the relatively small study population; however, the results indicate that peripheral muscle fatigue is the primary etiology in exercise limitation in post–COVID-19 patients.

“Our data suggest that treatment should emphasize comprehensive rehabilitation programs, including aerobic and muscle strengthening components,” Dr. Milani concluded.

COVID challenges remain unclear

“After COVID, patients often display a postviral syndrome with a wide range of symptoms,” Matthew Martinez, MD, a sports cardiologist at the Atlantic Health System in Morristown, N.J., in an interview said. “These conditions frequently lead to a sense of tiredness and weakness, pain, difficulty concentrating, and headaches that linger after the viral infection has cleared,” and these symptoms may continue for weeks.

However, this scenario is not unique to COVID-19: “This study confirms the importance of muscle fatigue in recovery,” said Dr. Martinez. “Recovery from viral illness requires hydration, sleep and slow progression return to exercise.” Consequently, Dr. Martinez said he was not surprised by the current study findings.

The take-home message for clinicians is to be aware that COVID-19 can have postviral syndrome, as is common after other infections, Dr. Martinez noted. The findings provide a starting point for discussing concerns with patients and explaining that a slow return to normal with usual care is expected. “Time to recovery will vary by individual,” he said. “Additional research is needed to identify which specific therapies are most important to help reduce time to recovery, and what new therapies could be developed to help facilitate muscle fatigue recovery and reduce time needed to recover.”

The study was supported by CAPES and CNPq. Dr. Milani had no financial conflicts to disclose. Dr. Martinez had no financial conflicts to disclose.

Peripheral muscle fatigue was the most common cause of exercise limitation in patients recovered from COVID-19 regardless of disease severity, in a study of nearly 300 individuals.

The source and magnitude of exercise intolerance in post–COVID-19 patients has not been well studied, said Mauricio Milani, MD, of Fitcordis Exercise Medicine Clinic, Brasilia, Brazil, in a presentation at the annual congress of the European Association of Preventive Cardiology.

Midas Anim/Shutterstock

To assess exercise intolerance, the researchers performed cardiopulmonary exercise testing (CPET) on 144 adults who had recovered from COVID-19 and 144 matched controls who had not had COVID-19. The average age of the participants was 43 years, and 57% were male. COVID-19 was defined as mild, moderate, or severe in 60%, 21%, and 19% of the cases, respectively.

Residual symptoms were present in 41% of cases. CPET was performed at roughly 14 weeks after disease onset.

Among the COVID-19 patients, most of the CPET limitations (92%) were caused by muscle fatigue; cardiovascular limitations were noted in 2%, and pulmonary limitations were noted in 6%.

Data from the post-COVID CPET showed differences in peak oxygen consumption, as well as the first and second ventilatory thresholds (VT1 and VT2) between COVID-19 patients and controls, and with lower values related to higher illness severities, Dr. Milani said. Heart rate also varied according to illness severity, with lower values significantly related to higher illness severities and significant differences between COVID patients and controls.

A total of 42 individuals with COVID-19 had previous CPET data for comparison (27 with mild disease and 15 with moderate or severe disease), Dr. Milani said. In the subgroup with mild disease, the only significant difference in CPET results before and after COVID-19 was peak speed. In the moderate/severe group, the researchers observed higher reductions in peak speed and also reductions in oxygen consumption at peak and thresholds.

However, peak oxygen flows were not different before and after COVID-19 in either the mild or moderate/severe subgroups, Dr. Milani said.

The study findings were limited in part by the relatively small study population; however, the results indicate that peripheral muscle fatigue is the primary etiology in exercise limitation in post–COVID-19 patients.

“Our data suggest that treatment should emphasize comprehensive rehabilitation programs, including aerobic and muscle strengthening components,” Dr. Milani concluded.

COVID challenges remain unclear

“After COVID, patients often display a postviral syndrome with a wide range of symptoms,” Matthew Martinez, MD, a sports cardiologist at the Atlantic Health System in Morristown, N.J., in an interview said. “These conditions frequently lead to a sense of tiredness and weakness, pain, difficulty concentrating, and headaches that linger after the viral infection has cleared,” and these symptoms may continue for weeks.

However, this scenario is not unique to COVID-19: “This study confirms the importance of muscle fatigue in recovery,” said Dr. Martinez. “Recovery from viral illness requires hydration, sleep and slow progression return to exercise.” Consequently, Dr. Martinez said he was not surprised by the current study findings.

The take-home message for clinicians is to be aware that COVID-19 can have postviral syndrome, as is common after other infections, Dr. Martinez noted. The findings provide a starting point for discussing concerns with patients and explaining that a slow return to normal with usual care is expected. “Time to recovery will vary by individual,” he said. “Additional research is needed to identify which specific therapies are most important to help reduce time to recovery, and what new therapies could be developed to help facilitate muscle fatigue recovery and reduce time needed to recover.”

The study was supported by CAPES and CNPq. Dr. Milani had no financial conflicts to disclose. Dr. Martinez had no financial conflicts to disclose.

During the first year of the pandemic, at least four people in Michigan were infected with a coronavirus variant that has been found in mink.

The cluster, which previously included three cases, marks the first known instance of likely animal-to-human “spillover” of the virus in the United States, according to the New York Times. All four people fully recovered.

Two of the infected people were employees of a mink farm in Michigan that had an outbreak in October 2020. The other two people didn’t have known links to the farm, which may mean that the coronavirus variant among mink may have been circulating more widely among residents in that area during that time.

Virus samples from all four people contained two mutations that may show signs of an adaptation to mink. The mutations have also been documented in farmed mink in Europe and people with connections to those farms.

“This, in addition to the mink farmworkers testing positive for COVID-19 after the mink herd had begun experiencing illness and increased mortality, suggests that the most likely hypothesis is that the workers were infected after contact with mink on the farm,” Casey Barton Behravesh, DVM, who directs the Centers for Disease Control and Prevention’s One Health Office, told the newspaper.

But researchers are unable to prove the cause, she noted.

“Because there are few genetic sequences available from the communities around the farm, it is impossible to know for sure whether the mutations came from mink on the farm or were already circulating in the community,” she said.

In August 2020, the U.S. Department of Agriculture announced the first confirmed COVID-19 case in mink at farms in Utah, followed by a case in Wisconsin. Worldwide, the coronavirus has been detected in mink on farms in the Netherlands, Denmark, Poland, and Spain.

In early October 2020, Michigan officials announced that the coronavirus had been detected in mink on a local farm. Several of the animals had died. The CDC helped to investigate the outbreak by collecting samples from animals, farmworkers, and residents in the community.

By March 2021, the CDC had updated its website to note that a “small number of people” had contracted a coronavirus variant that “contained unique mink-related mutations.”

In April 2021, the Detroit Free Press and the Documenting COVID-19 project first reported on the first three cases – two farmworkers and a taxidermist who didn’t have a connection to the mink farm. This week, the news outlets reported an update that the fourth case was the taxidermist’s wife.

Earlier this month, National Geographic first reported on the fourth human case based on government documents about the mink farm outbreak.

Overall, animal-to-human transmission is rare, but the CDC is continuing to monitor potential coronavirus cases in wildlife, livestock, and zoo animals for new variants and virus reservoirs, the Times reported.

“These results highlight the importance of routinely studying the genetic material of SARS-CoV-2 in susceptible animal populations like mink, as well as in people,” the CDC wrote.

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

During the first year of the pandemic, at least four people in Michigan were infected with a coronavirus variant that has been found in mink.

The cluster, which previously included three cases, marks the first known instance of likely animal-to-human “spillover” of the virus in the United States, according to the New York Times. All four people fully recovered.

Two of the infected people were employees of a mink farm in Michigan that had an outbreak in October 2020. The other two people didn’t have known links to the farm, which may mean that the coronavirus variant among mink may have been circulating more widely among residents in that area during that time.

Virus samples from all four people contained two mutations that may show signs of an adaptation to mink. The mutations have also been documented in farmed mink in Europe and people with connections to those farms.

“This, in addition to the mink farmworkers testing positive for COVID-19 after the mink herd had begun experiencing illness and increased mortality, suggests that the most likely hypothesis is that the workers were infected after contact with mink on the farm,” Casey Barton Behravesh, DVM, who directs the Centers for Disease Control and Prevention’s One Health Office, told the newspaper.

But researchers are unable to prove the cause, she noted.

“Because there are few genetic sequences available from the communities around the farm, it is impossible to know for sure whether the mutations came from mink on the farm or were already circulating in the community,” she said.

In August 2020, the U.S. Department of Agriculture announced the first confirmed COVID-19 case in mink at farms in Utah, followed by a case in Wisconsin. Worldwide, the coronavirus has been detected in mink on farms in the Netherlands, Denmark, Poland, and Spain.

In early October 2020, Michigan officials announced that the coronavirus had been detected in mink on a local farm. Several of the animals had died. The CDC helped to investigate the outbreak by collecting samples from animals, farmworkers, and residents in the community.

By March 2021, the CDC had updated its website to note that a “small number of people” had contracted a coronavirus variant that “contained unique mink-related mutations.”

In April 2021, the Detroit Free Press and the Documenting COVID-19 project first reported on the first three cases – two farmworkers and a taxidermist who didn’t have a connection to the mink farm. This week, the news outlets reported an update that the fourth case was the taxidermist’s wife.

Earlier this month, National Geographic first reported on the fourth human case based on government documents about the mink farm outbreak.

Overall, animal-to-human transmission is rare, but the CDC is continuing to monitor potential coronavirus cases in wildlife, livestock, and zoo animals for new variants and virus reservoirs, the Times reported.

“These results highlight the importance of routinely studying the genetic material of SARS-CoV-2 in susceptible animal populations like mink, as well as in people,” the CDC wrote.

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

During the first year of the pandemic, at least four people in Michigan were infected with a coronavirus variant that has been found in mink.

The cluster, which previously included three cases, marks the first known instance of likely animal-to-human “spillover” of the virus in the United States, according to the New York Times. All four people fully recovered.

Two of the infected people were employees of a mink farm in Michigan that had an outbreak in October 2020. The other two people didn’t have known links to the farm, which may mean that the coronavirus variant among mink may have been circulating more widely among residents in that area during that time.

Virus samples from all four people contained two mutations that may show signs of an adaptation to mink. The mutations have also been documented in farmed mink in Europe and people with connections to those farms.

“This, in addition to the mink farmworkers testing positive for COVID-19 after the mink herd had begun experiencing illness and increased mortality, suggests that the most likely hypothesis is that the workers were infected after contact with mink on the farm,” Casey Barton Behravesh, DVM, who directs the Centers for Disease Control and Prevention’s One Health Office, told the newspaper.

But researchers are unable to prove the cause, she noted.

“Because there are few genetic sequences available from the communities around the farm, it is impossible to know for sure whether the mutations came from mink on the farm or were already circulating in the community,” she said.

In August 2020, the U.S. Department of Agriculture announced the first confirmed COVID-19 case in mink at farms in Utah, followed by a case in Wisconsin. Worldwide, the coronavirus has been detected in mink on farms in the Netherlands, Denmark, Poland, and Spain.

In early October 2020, Michigan officials announced that the coronavirus had been detected in mink on a local farm. Several of the animals had died. The CDC helped to investigate the outbreak by collecting samples from animals, farmworkers, and residents in the community.

By March 2021, the CDC had updated its website to note that a “small number of people” had contracted a coronavirus variant that “contained unique mink-related mutations.”

In April 2021, the Detroit Free Press and the Documenting COVID-19 project first reported on the first three cases – two farmworkers and a taxidermist who didn’t have a connection to the mink farm. This week, the news outlets reported an update that the fourth case was the taxidermist’s wife.

Earlier this month, National Geographic first reported on the fourth human case based on government documents about the mink farm outbreak.

Overall, animal-to-human transmission is rare, but the CDC is continuing to monitor potential coronavirus cases in wildlife, livestock, and zoo animals for new variants and virus reservoirs, the Times reported.

“These results highlight the importance of routinely studying the genetic material of SARS-CoV-2 in susceptible animal populations like mink, as well as in people,” the CDC wrote.

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

It was a good run while it lasted.

New COVID-19 cases in U.S. children had dropped for 11 consecutive weeks, but that streak has come to an end, as cases increased 28% during the week of April 8-14, according to the American Academy of Pediatrics and the Children’s Hospital Association.

The number of reported pediatric cases for the week was 33,146, and the actual increase from the previous week was just 7,231 cases, the AAP and CHA said, but some reports suggest that the new COVID variants and subvariants are starting to have an effect on incidence in some areas while mask mandates continue to fall.

Data from the Centers for Disease Control and Prevention show that, over the last week or two, the 7-day average for percentage of emergency department visits with diagnosed COVID has risen from 0.5% to 0.6% in children aged 0-11 years, from 0.3% to 0.5% among 12- to 15-year-olds, and from 0.3% to 0.4% in 16- and 17-year-olds. Small increases, to be sure, but increases nonetheless.

A somewhat similar scenario is playing out for new admissions of children aged 0-17, which have leveled out after dropping from a high of 1.25 per 100,000 population in mid-January to 0.13 per 100,000 in early April. Over the last 2 weeks, the rate has been alternating between 0.13 and 0.14 per 100,000, the CDC said on its COVID Data Tracker.

The latest news on the vaccination front came from Pfizer and BIoNTech, which announced that a third dose of its COVID-19 vaccine boosted immune protection in children aged 5-11 years in a phase 2/3 trial. Protection against the Omicron strain was 36 times higher than the two previous doses, the companies said, adding that they plan to submit a request for emergency use authorization of a booster dose in the near future.

The ongoing vaccination effort, however, produced mixed results in the last week. Initial vaccinations among children aged 5-11 years fell 14.5% to another new low while initial doses were up 9.3% for those aged 12-17, the AAP said. Overall, just 28.2% of the country’s 5- to 11-year-olds are fully vaccinated, compared with 58.7% of those aged 12-17, the CDC reported.

[email protected]

It was a good run while it lasted.

New COVID-19 cases in U.S. children had dropped for 11 consecutive weeks, but that streak has come to an end, as cases increased 28% during the week of April 8-14, according to the American Academy of Pediatrics and the Children’s Hospital Association.

The number of reported pediatric cases for the week was 33,146, and the actual increase from the previous week was just 7,231 cases, the AAP and CHA said, but some reports suggest that the new COVID variants and subvariants are starting to have an effect on incidence in some areas while mask mandates continue to fall.

Data from the Centers for Disease Control and Prevention show that, over the last week or two, the 7-day average for percentage of emergency department visits with diagnosed COVID has risen from 0.5% to 0.6% in children aged 0-11 years, from 0.3% to 0.5% among 12- to 15-year-olds, and from 0.3% to 0.4% in 16- and 17-year-olds. Small increases, to be sure, but increases nonetheless.

A somewhat similar scenario is playing out for new admissions of children aged 0-17, which have leveled out after dropping from a high of 1.25 per 100,000 population in mid-January to 0.13 per 100,000 in early April. Over the last 2 weeks, the rate has been alternating between 0.13 and 0.14 per 100,000, the CDC said on its COVID Data Tracker.

The latest news on the vaccination front came from Pfizer and BIoNTech, which announced that a third dose of its COVID-19 vaccine boosted immune protection in children aged 5-11 years in a phase 2/3 trial. Protection against the Omicron strain was 36 times higher than the two previous doses, the companies said, adding that they plan to submit a request for emergency use authorization of a booster dose in the near future.

The ongoing vaccination effort, however, produced mixed results in the last week. Initial vaccinations among children aged 5-11 years fell 14.5% to another new low while initial doses were up 9.3% for those aged 12-17, the AAP said. Overall, just 28.2% of the country’s 5- to 11-year-olds are fully vaccinated, compared with 58.7% of those aged 12-17, the CDC reported.

[email protected]

It was a good run while it lasted.

New COVID-19 cases in U.S. children had dropped for 11 consecutive weeks, but that streak has come to an end, as cases increased 28% during the week of April 8-14, according to the American Academy of Pediatrics and the Children’s Hospital Association.

The number of reported pediatric cases for the week was 33,146, and the actual increase from the previous week was just 7,231 cases, the AAP and CHA said, but some reports suggest that the new COVID variants and subvariants are starting to have an effect on incidence in some areas while mask mandates continue to fall.

Data from the Centers for Disease Control and Prevention show that, over the last week or two, the 7-day average for percentage of emergency department visits with diagnosed COVID has risen from 0.5% to 0.6% in children aged 0-11 years, from 0.3% to 0.5% among 12- to 15-year-olds, and from 0.3% to 0.4% in 16- and 17-year-olds. Small increases, to be sure, but increases nonetheless.

A somewhat similar scenario is playing out for new admissions of children aged 0-17, which have leveled out after dropping from a high of 1.25 per 100,000 population in mid-January to 0.13 per 100,000 in early April. Over the last 2 weeks, the rate has been alternating between 0.13 and 0.14 per 100,000, the CDC said on its COVID Data Tracker.

The latest news on the vaccination front came from Pfizer and BIoNTech, which announced that a third dose of its COVID-19 vaccine boosted immune protection in children aged 5-11 years in a phase 2/3 trial. Protection against the Omicron strain was 36 times higher than the two previous doses, the companies said, adding that they plan to submit a request for emergency use authorization of a booster dose in the near future.

The ongoing vaccination effort, however, produced mixed results in the last week. Initial vaccinations among children aged 5-11 years fell 14.5% to another new low while initial doses were up 9.3% for those aged 12-17, the AAP said. Overall, just 28.2% of the country’s 5- to 11-year-olds are fully vaccinated, compared with 58.7% of those aged 12-17, the CDC reported.

[email protected]

Older age and higher ferritin levels at hospital admission predict severe illness in COVID-related multisystem inflammatory syndrome in children (MIS-C), according to a Canadian multicenter cohort study.

The adjusted absolute risk for admission to an intensive care unit was 43.6% among children aged 6 years and older and 46.2% in children aged 13 to 17 years, compared with 18.4% in children aged 5 years or younger.

“We do not understand why teens get more severe MIS-C than younger children,” senior author Joan Robinson, MD, of the University of Alberta, Edmonton, told this news organization. “It is possible that more exposures to other coronaviruses in the past result in them having a more robust immune response to SARS-CoV-2, which results in more inflammation.”

The data were published  in the Canadian Medical Association Journal.
 

A multinational study

The study included data on 232 children admitted with probable or confirmed MIS-C at 15 hospitals in Canada, Iran, and Costa Rica between March 1, 2020, and March 7, 2021. The median age of the children was 5.8 years, 56.0% were boys, and 21.6% had comorbidities.

Although cardiac involvement was common (58.6%), and almost one-third of the cohort (31.5%) was admitted to an ICU, “recovery was typically rapid, with 85% of patients discharged within 10 days,” said Dr. Robinson, for the Pediatric Investigators Collaborative Network on Infections in Canada (PICNIC).
 

Older age as a risk

The results suggest that older age is associated with increased risk of severe MIS-C. “However, one would then predict that adults would be at even higher risk than teens, whereas the same syndrome in adults (MIS-A) is very, very rare,” said Dr. Robinson.

The study also found that children admitted with ferritin levels greater than 500 μg/L, signaling greater inflammation, also had an increased risk for ICU admission, compared with those with lower levels (adjusted risk difference, 18.4%; relative risk, 1.69). “This is presumably because the more inflammation that the child has, the more likely they are to have inflammation of the heart, which can lead to low blood pressure,” said Dr. Robinson.
 

Features of MIS-C

Among all patients with MIS-C, gastrointestinal involvement was common (89.2%), as were mucocutaneous findings (84.5%). Children with MIS-C had fever for a median duration of 6 days. “Clinicians who see children in their practice commonly have to determine why a child is febrile. Our study shows that one mainly has to consider MIS-C if febrile children have a rash and one or more of vomiting, diarrhea, or abdominal pain,” said Dr. Robinson. 

The study also found that patients with MIS-C who were admitted to the hospital in the latter part of the study period (Nov. 1, 2020, to March 7, 2021) were slightly more likely to require ICU admission, compared with those admitted between March 1 and Oct. 31, 2020. “We cannot provide a clear explanation [for this],” the authors noted. “The features of severe MIS-C were widely publicized by May 2020, so it seems unlikely that severe cases were missed early in the study period. SARS-CoV-2 variants of concern have replaced the wild-type virus. It is possible that the immune response to circulating variants alters the severity of COVID-19 and MIS-C, when compared with wild-type virus.”

Despite initial concerns that pediatric COVID-19 vaccines might cause MIS-C, Dr. Robinson says data suggest this is rarely, if ever, the case, and that vaccines actually prevent the syndrome. She says further studies will be needed to assess MIS-C risk following reinfection with SARS-CoV-2. “I am an optimistic person, and it is my hope that MIS-C following reinfection is rare,” she said. “If this is the case, perhaps we will see very few cases once almost all children have been immunized and/or had SARS-CoV-2 infection.”  
 

‘Differences across countries’

Adrienne Randolph, MD, a pediatrician at Harvard Medical School, Boston, and senior author of a large case series of patients with MIS-C, said that the Canadian study is valuable because it includes children from three countries. “It’s very interesting that there are differences across countries,” she said. “The patients in Iran had the highest percentage (58.7%) going into the ICU, whereas Costa Rica had the lowest percentage (9.2%), and the percentage going to the ICU in Canada (34.7%) was less than the percentages we see in the U.S. – which is pretty consistently about 60% to 70% of MIS-C patients going into the ICU.” Dr. Randolph was not involved in the current study.

Reasons for differences in the rates of ICU visits will be important to explore in the effort to standardize diagnostic criteria, stratification of severity, and recommendations for treatment of MIS-C, said Dr. Randolph.

“What is consistent is that the younger kids, zero to 5 years, in general are less ill,” she said. “That’s been consistent across multiple countries.” It’s unclear whether the cause of this difference is that parents observe younger patients more closely than they do teenagers, or whether other aspects of adolescence, such as prevalence of obesity and attendant inflammation, are at work, said Dr. Randolph.

What is also unclear is why hospitalized patients with MIS-C had higher percentages of ICU admission in the latter part of the study period, compared with the earlier period. “Did the patients change, or did practice change as we got to understand the disease process?” asked Dr. Randolph. “It could be that they got better at the diagnosis and were weeding out some of the patients who they realized didn’t need to be hospitalized. At the very beginning, we had a very low threshold to admit patients, because we didn’t know, and then, over time, people understood what was going on and felt more comfortable monitoring them as outpatients.”

This study was partially funded by a Janeway Foundation Research Grant to support data collection. Dr. Robinson disclosed no conflicts of interest. Dr. Randolph reported receiving royalties from UpToDate and personal fees from the La Jolla Pharmaceutical Company.

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

Older age and higher ferritin levels at hospital admission predict severe illness in COVID-related multisystem inflammatory syndrome in children (MIS-C), according to a Canadian multicenter cohort study.

The adjusted absolute risk for admission to an intensive care unit was 43.6% among children aged 6 years and older and 46.2% in children aged 13 to 17 years, compared with 18.4% in children aged 5 years or younger.

“We do not understand why teens get more severe MIS-C than younger children,” senior author Joan Robinson, MD, of the University of Alberta, Edmonton, told this news organization. “It is possible that more exposures to other coronaviruses in the past result in them having a more robust immune response to SARS-CoV-2, which results in more inflammation.”

The data were published  in the Canadian Medical Association Journal.
 

A multinational study

The study included data on 232 children admitted with probable or confirmed MIS-C at 15 hospitals in Canada, Iran, and Costa Rica between March 1, 2020, and March 7, 2021. The median age of the children was 5.8 years, 56.0% were boys, and 21.6% had comorbidities.

Although cardiac involvement was common (58.6%), and almost one-third of the cohort (31.5%) was admitted to an ICU, “recovery was typically rapid, with 85% of patients discharged within 10 days,” said Dr. Robinson, for the Pediatric Investigators Collaborative Network on Infections in Canada (PICNIC).
 

Older age as a risk

The results suggest that older age is associated with increased risk of severe MIS-C. “However, one would then predict that adults would be at even higher risk than teens, whereas the same syndrome in adults (MIS-A) is very, very rare,” said Dr. Robinson.

The study also found that children admitted with ferritin levels greater than 500 μg/L, signaling greater inflammation, also had an increased risk for ICU admission, compared with those with lower levels (adjusted risk difference, 18.4%; relative risk, 1.69). “This is presumably because the more inflammation that the child has, the more likely they are to have inflammation of the heart, which can lead to low blood pressure,” said Dr. Robinson.
 

Features of MIS-C

Among all patients with MIS-C, gastrointestinal involvement was common (89.2%), as were mucocutaneous findings (84.5%). Children with MIS-C had fever for a median duration of 6 days. “Clinicians who see children in their practice commonly have to determine why a child is febrile. Our study shows that one mainly has to consider MIS-C if febrile children have a rash and one or more of vomiting, diarrhea, or abdominal pain,” said Dr. Robinson. 

The study also found that patients with MIS-C who were admitted to the hospital in the latter part of the study period (Nov. 1, 2020, to March 7, 2021) were slightly more likely to require ICU admission, compared with those admitted between March 1 and Oct. 31, 2020. “We cannot provide a clear explanation [for this],” the authors noted. “The features of severe MIS-C were widely publicized by May 2020, so it seems unlikely that severe cases were missed early in the study period. SARS-CoV-2 variants of concern have replaced the wild-type virus. It is possible that the immune response to circulating variants alters the severity of COVID-19 and MIS-C, when compared with wild-type virus.”

Despite initial concerns that pediatric COVID-19 vaccines might cause MIS-C, Dr. Robinson says data suggest this is rarely, if ever, the case, and that vaccines actually prevent the syndrome. She says further studies will be needed to assess MIS-C risk following reinfection with SARS-CoV-2. “I am an optimistic person, and it is my hope that MIS-C following reinfection is rare,” she said. “If this is the case, perhaps we will see very few cases once almost all children have been immunized and/or had SARS-CoV-2 infection.”  
 

‘Differences across countries’

Adrienne Randolph, MD, a pediatrician at Harvard Medical School, Boston, and senior author of a large case series of patients with MIS-C, said that the Canadian study is valuable because it includes children from three countries. “It’s very interesting that there are differences across countries,” she said. “The patients in Iran had the highest percentage (58.7%) going into the ICU, whereas Costa Rica had the lowest percentage (9.2%), and the percentage going to the ICU in Canada (34.7%) was less than the percentages we see in the U.S. – which is pretty consistently about 60% to 70% of MIS-C patients going into the ICU.” Dr. Randolph was not involved in the current study.

Reasons for differences in the rates of ICU visits will be important to explore in the effort to standardize diagnostic criteria, stratification of severity, and recommendations for treatment of MIS-C, said Dr. Randolph.

“What is consistent is that the younger kids, zero to 5 years, in general are less ill,” she said. “That’s been consistent across multiple countries.” It’s unclear whether the cause of this difference is that parents observe younger patients more closely than they do teenagers, or whether other aspects of adolescence, such as prevalence of obesity and attendant inflammation, are at work, said Dr. Randolph.

What is also unclear is why hospitalized patients with MIS-C had higher percentages of ICU admission in the latter part of the study period, compared with the earlier period. “Did the patients change, or did practice change as we got to understand the disease process?” asked Dr. Randolph. “It could be that they got better at the diagnosis and were weeding out some of the patients who they realized didn’t need to be hospitalized. At the very beginning, we had a very low threshold to admit patients, because we didn’t know, and then, over time, people understood what was going on and felt more comfortable monitoring them as outpatients.”

This study was partially funded by a Janeway Foundation Research Grant to support data collection. Dr. Robinson disclosed no conflicts of interest. Dr. Randolph reported receiving royalties from UpToDate and personal fees from the La Jolla Pharmaceutical Company.

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

Older age and higher ferritin levels at hospital admission predict severe illness in COVID-related multisystem inflammatory syndrome in children (MIS-C), according to a Canadian multicenter cohort study.

The adjusted absolute risk for admission to an intensive care unit was 43.6% among children aged 6 years and older and 46.2% in children aged 13 to 17 years, compared with 18.4% in children aged 5 years or younger.

“We do not understand why teens get more severe MIS-C than younger children,” senior author Joan Robinson, MD, of the University of Alberta, Edmonton, told this news organization. “It is possible that more exposures to other coronaviruses in the past result in them having a more robust immune response to SARS-CoV-2, which results in more inflammation.”

The data were published  in the Canadian Medical Association Journal.
 

A multinational study

The study included data on 232 children admitted with probable or confirmed MIS-C at 15 hospitals in Canada, Iran, and Costa Rica between March 1, 2020, and March 7, 2021. The median age of the children was 5.8 years, 56.0% were boys, and 21.6% had comorbidities.

Although cardiac involvement was common (58.6%), and almost one-third of the cohort (31.5%) was admitted to an ICU, “recovery was typically rapid, with 85% of patients discharged within 10 days,” said Dr. Robinson, for the Pediatric Investigators Collaborative Network on Infections in Canada (PICNIC).
 

Older age as a risk

The results suggest that older age is associated with increased risk of severe MIS-C. “However, one would then predict that adults would be at even higher risk than teens, whereas the same syndrome in adults (MIS-A) is very, very rare,” said Dr. Robinson.

The study also found that children admitted with ferritin levels greater than 500 μg/L, signaling greater inflammation, also had an increased risk for ICU admission, compared with those with lower levels (adjusted risk difference, 18.4%; relative risk, 1.69). “This is presumably because the more inflammation that the child has, the more likely they are to have inflammation of the heart, which can lead to low blood pressure,” said Dr. Robinson.
 

Features of MIS-C

Among all patients with MIS-C, gastrointestinal involvement was common (89.2%), as were mucocutaneous findings (84.5%). Children with MIS-C had fever for a median duration of 6 days. “Clinicians who see children in their practice commonly have to determine why a child is febrile. Our study shows that one mainly has to consider MIS-C if febrile children have a rash and one or more of vomiting, diarrhea, or abdominal pain,” said Dr. Robinson. 

The study also found that patients with MIS-C who were admitted to the hospital in the latter part of the study period (Nov. 1, 2020, to March 7, 2021) were slightly more likely to require ICU admission, compared with those admitted between March 1 and Oct. 31, 2020. “We cannot provide a clear explanation [for this],” the authors noted. “The features of severe MIS-C were widely publicized by May 2020, so it seems unlikely that severe cases were missed early in the study period. SARS-CoV-2 variants of concern have replaced the wild-type virus. It is possible that the immune response to circulating variants alters the severity of COVID-19 and MIS-C, when compared with wild-type virus.”

Despite initial concerns that pediatric COVID-19 vaccines might cause MIS-C, Dr. Robinson says data suggest this is rarely, if ever, the case, and that vaccines actually prevent the syndrome. She says further studies will be needed to assess MIS-C risk following reinfection with SARS-CoV-2. “I am an optimistic person, and it is my hope that MIS-C following reinfection is rare,” she said. “If this is the case, perhaps we will see very few cases once almost all children have been immunized and/or had SARS-CoV-2 infection.”  
 

‘Differences across countries’

Adrienne Randolph, MD, a pediatrician at Harvard Medical School, Boston, and senior author of a large case series of patients with MIS-C, said that the Canadian study is valuable because it includes children from three countries. “It’s very interesting that there are differences across countries,” she said. “The patients in Iran had the highest percentage (58.7%) going into the ICU, whereas Costa Rica had the lowest percentage (9.2%), and the percentage going to the ICU in Canada (34.7%) was less than the percentages we see in the U.S. – which is pretty consistently about 60% to 70% of MIS-C patients going into the ICU.” Dr. Randolph was not involved in the current study.

Reasons for differences in the rates of ICU visits will be important to explore in the effort to standardize diagnostic criteria, stratification of severity, and recommendations for treatment of MIS-C, said Dr. Randolph.

“What is consistent is that the younger kids, zero to 5 years, in general are less ill,” she said. “That’s been consistent across multiple countries.” It’s unclear whether the cause of this difference is that parents observe younger patients more closely than they do teenagers, or whether other aspects of adolescence, such as prevalence of obesity and attendant inflammation, are at work, said Dr. Randolph.

What is also unclear is why hospitalized patients with MIS-C had higher percentages of ICU admission in the latter part of the study period, compared with the earlier period. “Did the patients change, or did practice change as we got to understand the disease process?” asked Dr. Randolph. “It could be that they got better at the diagnosis and were weeding out some of the patients who they realized didn’t need to be hospitalized. At the very beginning, we had a very low threshold to admit patients, because we didn’t know, and then, over time, people understood what was going on and felt more comfortable monitoring them as outpatients.”

This study was partially funded by a Janeway Foundation Research Grant to support data collection. Dr. Robinson disclosed no conflicts of interest. Dr. Randolph reported receiving royalties from UpToDate and personal fees from the La Jolla Pharmaceutical Company.

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