Influenza

The American Academy of Pediatrics said it supports the Recommended Childhood and Adolescent Immunization Schedule: United States, 2022.

In a policy statement published online Feb. 17 in Pediatrics, the AAP said the updated recommendations differ little from those released last year by the Advisory Committee on Immunization Practices of the Centers for Disease Control and Prevention.

“The only significant change this year was to add the dengue vaccine to the schedule,” Sean T. O’Leary, MD, MPH, vice chair of the AAP’s 2021-2022 Committee on Infectious Diseases and a coauthor of the statement, told this news organization. “But that is really only relevant for children living in endemic areas, primarily Puerto Rico but some other smaller U.S .territories as well.”

Dengue fever also is endemic in American Samoa and the U.S. Virgin Islands.

Notably, a new section has been added on routine recommendations for use of the Dengvaxia vaccine.

The 2022 policy statement addresses regular immunization of children from birth to 18 years and catch-up vaccination for those aged 4 months to 18 years. In addition to the AAP, multiple complementary physician and nurse organizations have approved the updates. The ACIP schedule is revised annually to reflect current recommendations on vaccines licensed by the U.S. Food and Drug Administration.

Most of the other changes this year involve minor updates to clarify language or improve usability. “CDC and AAP are always working to make the schedule as user-friendly as possible, with improvements made every year,” Dr. O’Leary, professor of pediatric infectious diseases at the University of Colorado at Denver, Aurora, said.

In terms of physician acceptance, he added, “I don’t think any of the changes would be considered controversial.”

Among other updates and clarifications:

• For Haemophilus influenzae type b (Hib) vaccination, the text now includes recommendations for the hexavalent Vaxelis vaccine (diphtheria, tetanus, pertussis, polio, Hib, and hepatitis B) for both routine and catch-up vaccination.
• For hepatitis A, the relevant note has been updated to clarify the age for routine vaccination.
• For human papillomavirus (HPV), the note now clarifies when an HPV series is complete with no additional dose recommended.
• The special situations section has been amended to specify which persons with immunocompromising conditions such as HIV should receive three doses of HPV vaccine regardless of age at initial vaccination.
• For measles, mumps, and rubella, routine vaccination now includes recommendations on the combination measles, mumps, rubella, and varicella vaccine.
• For meningococcal serogroup A, C, W, and Y vaccines, the augmented text explains when these can be simultaneously administered with serogroup B meningococcal vaccines, preferably at different anatomic sites. The language for the dosing schedule for Menveo vaccination in infants also has been clarified.
• In the catch-up immunization schedule for late-starting children aged 4 months to 18 years, the text on Hib has been changed so that the minimum interval between dose two and dose three now refers to Vaxelis, while reference to the discontinued Comvax (Hib-Hep B) vaccine has been removed.

As in other years, graphic changes have been made to table coloration and layout to improve accessibility. And as before, the 2022 childhood and adolescent immunization schedule has been updated to ensure consistency between its format and that of the 2022 adult immunization schedules.

The AAP committee stressed that clinically significant adverse events after immunization should be reported to the Vaccine Adverse Event Reporting System.

The full 2022 schedule can be found on the CDC’s website.

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

The American Academy of Pediatrics said it supports the Recommended Childhood and Adolescent Immunization Schedule: United States, 2022.

In a policy statement published online Feb. 17 in Pediatrics, the AAP said the updated recommendations differ little from those released last year by the Advisory Committee on Immunization Practices of the Centers for Disease Control and Prevention.

“The only significant change this year was to add the dengue vaccine to the schedule,” Sean T. O’Leary, MD, MPH, vice chair of the AAP’s 2021-2022 Committee on Infectious Diseases and a coauthor of the statement, told this news organization. “But that is really only relevant for children living in endemic areas, primarily Puerto Rico but some other smaller U.S .territories as well.”

Dengue fever also is endemic in American Samoa and the U.S. Virgin Islands.

Notably, a new section has been added on routine recommendations for use of the Dengvaxia vaccine.

The 2022 policy statement addresses regular immunization of children from birth to 18 years and catch-up vaccination for those aged 4 months to 18 years. In addition to the AAP, multiple complementary physician and nurse organizations have approved the updates. The ACIP schedule is revised annually to reflect current recommendations on vaccines licensed by the U.S. Food and Drug Administration.

Most of the other changes this year involve minor updates to clarify language or improve usability. “CDC and AAP are always working to make the schedule as user-friendly as possible, with improvements made every year,” Dr. O’Leary, professor of pediatric infectious diseases at the University of Colorado at Denver, Aurora, said.

In terms of physician acceptance, he added, “I don’t think any of the changes would be considered controversial.”

Among other updates and clarifications:

• For Haemophilus influenzae type b (Hib) vaccination, the text now includes recommendations for the hexavalent Vaxelis vaccine (diphtheria, tetanus, pertussis, polio, Hib, and hepatitis B) for both routine and catch-up vaccination.
• For hepatitis A, the relevant note has been updated to clarify the age for routine vaccination.
• For human papillomavirus (HPV), the note now clarifies when an HPV series is complete with no additional dose recommended.
• The special situations section has been amended to specify which persons with immunocompromising conditions such as HIV should receive three doses of HPV vaccine regardless of age at initial vaccination.
• For measles, mumps, and rubella, routine vaccination now includes recommendations on the combination measles, mumps, rubella, and varicella vaccine.
• For meningococcal serogroup A, C, W, and Y vaccines, the augmented text explains when these can be simultaneously administered with serogroup B meningococcal vaccines, preferably at different anatomic sites. The language for the dosing schedule for Menveo vaccination in infants also has been clarified.
• In the catch-up immunization schedule for late-starting children aged 4 months to 18 years, the text on Hib has been changed so that the minimum interval between dose two and dose three now refers to Vaxelis, while reference to the discontinued Comvax (Hib-Hep B) vaccine has been removed.

As in other years, graphic changes have been made to table coloration and layout to improve accessibility. And as before, the 2022 childhood and adolescent immunization schedule has been updated to ensure consistency between its format and that of the 2022 adult immunization schedules.

The AAP committee stressed that clinically significant adverse events after immunization should be reported to the Vaccine Adverse Event Reporting System.

The full 2022 schedule can be found on the CDC’s website.

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

The American Academy of Pediatrics said it supports the Recommended Childhood and Adolescent Immunization Schedule: United States, 2022.

In a policy statement published online Feb. 17 in Pediatrics, the AAP said the updated recommendations differ little from those released last year by the Advisory Committee on Immunization Practices of the Centers for Disease Control and Prevention.

“The only significant change this year was to add the dengue vaccine to the schedule,” Sean T. O’Leary, MD, MPH, vice chair of the AAP’s 2021-2022 Committee on Infectious Diseases and a coauthor of the statement, told this news organization. “But that is really only relevant for children living in endemic areas, primarily Puerto Rico but some other smaller U.S .territories as well.”

Dengue fever also is endemic in American Samoa and the U.S. Virgin Islands.

Notably, a new section has been added on routine recommendations for use of the Dengvaxia vaccine.

The 2022 policy statement addresses regular immunization of children from birth to 18 years and catch-up vaccination for those aged 4 months to 18 years. In addition to the AAP, multiple complementary physician and nurse organizations have approved the updates. The ACIP schedule is revised annually to reflect current recommendations on vaccines licensed by the U.S. Food and Drug Administration.

Most of the other changes this year involve minor updates to clarify language or improve usability. “CDC and AAP are always working to make the schedule as user-friendly as possible, with improvements made every year,” Dr. O’Leary, professor of pediatric infectious diseases at the University of Colorado at Denver, Aurora, said.

In terms of physician acceptance, he added, “I don’t think any of the changes would be considered controversial.”

Among other updates and clarifications:

• For Haemophilus influenzae type b (Hib) vaccination, the text now includes recommendations for the hexavalent Vaxelis vaccine (diphtheria, tetanus, pertussis, polio, Hib, and hepatitis B) for both routine and catch-up vaccination.
• For hepatitis A, the relevant note has been updated to clarify the age for routine vaccination.
• For human papillomavirus (HPV), the note now clarifies when an HPV series is complete with no additional dose recommended.
• The special situations section has been amended to specify which persons with immunocompromising conditions such as HIV should receive three doses of HPV vaccine regardless of age at initial vaccination.
• For measles, mumps, and rubella, routine vaccination now includes recommendations on the combination measles, mumps, rubella, and varicella vaccine.
• For meningococcal serogroup A, C, W, and Y vaccines, the augmented text explains when these can be simultaneously administered with serogroup B meningococcal vaccines, preferably at different anatomic sites. The language for the dosing schedule for Menveo vaccination in infants also has been clarified.
• In the catch-up immunization schedule for late-starting children aged 4 months to 18 years, the text on Hib has been changed so that the minimum interval between dose two and dose three now refers to Vaxelis, while reference to the discontinued Comvax (Hib-Hep B) vaccine has been removed.

As in other years, graphic changes have been made to table coloration and layout to improve accessibility. And as before, the 2022 childhood and adolescent immunization schedule has been updated to ensure consistency between its format and that of the 2022 adult immunization schedules.

The AAP committee stressed that clinically significant adverse events after immunization should be reported to the Vaccine Adverse Event Reporting System.

The full 2022 schedule can be found on the CDC’s website.

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

Hospitalized intensive care patients with respiratory syncytial virus were significantly more likely to be immunocompromised and to have chronic respiratory conditions than those with influenza infections, but in-hospital mortality rates were similar, based on data from 618 adults.

Respiratory syncytial virus is common in adults, but characteristics of RSV patients requiring ICU care have not been explored, despite routine testing for RSV in critically ill patients in many institutions, Julien Coussement, PhD, of Université Libre de Bruxelles, Brussels, and colleagues wrote.

“Influenza is another respiratory virus routinely tested for in ICU patients with respiratory symptoms because of its well-known morbidity and mortality, but there are no data specifically comparing RSV and influenza infections in adult ICU patients,” they noted.

In a retrospective, multicenter study published in the journal CHEST, the researchers analyzed data from 309 adult ICU patients with RSV infection and 309 with influenza infection between November 2011 and April 2018 from 17 sites in France and Belgium. Each RSV patient was matched to a flu patient according to institution and date of diagnosis.

The primary objective was a comparison of in-hospital mortality between the groups, defined as death from any cause during an index hospital stay in acute care. Secondary objectives were comparisons of the clinical and biological characteristics of patients with RSV versus flu.

Overall, in-hospital mortality was not significantly different between the RSV and influenza groups (23.9% vs. 25.6%, P = .63).

However, patients with RSV infection were significantly more likely than those with flu to have an underlying chronic respiratory condition (60.2% vs. 40.1%, P < .001) and to be immunocompromised (35% vs. 26.2%, P = .02). Very few of the patients overall (39 patients, 6.3%) were considered young and healthy prior to hospitalization; and significantly fewer of these were in the RSV group than in the influenza group (9 patients and 30 patients, respectively).

Airway obstruction at the time of diagnosis was significantly more common in the RSV patients than in influenza patients (49.5% vs. 39.5%, P = .01), but influenza patients were significantly more likely to have acute respiratory distress syndrome at the time of diagnosis (21.7% vs. 14.6%, P = .02). Rates of coinfections were similar between the groups, and approximately 60% of coinfected patients received at least 72 hours of therapeutic antibiotics. Overall length of hospital stay, ICU stay, and duration of mechanical ventilation were similar between the groups.

The results show that severe RSV occurs mainly in older patients with comorbidities, and these results reflect data from previous studies, the researchers wrote in their discussion. In addition, “patients with influenza infection were significantly more likely to have fever, myalgia, increased CPK level, thrombocytopenia and transaminitis at diagnosis than were those with RSV infection. Whether these differences may be used to guide patient management remains to be determined.”

The study findings were limited by several factors including the retrospective design, and testing for respiratory viruses on symptomatic patients only, rather than all ICU patients, the researchers noted. Other limitations include the inability to show a causal link between viral infections and patient outcomes and the heterogenous management of patients among different centers.

However, the results were strengthened by the large sample size and multivariate analysis, and support the need for interventions to prevent and treat severe RSV, they concluded.

The study received no outside funding. Lead author Dr. Coussement disclosed serving on advisory board for Sanofi.

Hospitalized intensive care patients with respiratory syncytial virus were significantly more likely to be immunocompromised and to have chronic respiratory conditions than those with influenza infections, but in-hospital mortality rates were similar, based on data from 618 adults.

Respiratory syncytial virus is common in adults, but characteristics of RSV patients requiring ICU care have not been explored, despite routine testing for RSV in critically ill patients in many institutions, Julien Coussement, PhD, of Université Libre de Bruxelles, Brussels, and colleagues wrote.

“Influenza is another respiratory virus routinely tested for in ICU patients with respiratory symptoms because of its well-known morbidity and mortality, but there are no data specifically comparing RSV and influenza infections in adult ICU patients,” they noted.

In a retrospective, multicenter study published in the journal CHEST, the researchers analyzed data from 309 adult ICU patients with RSV infection and 309 with influenza infection between November 2011 and April 2018 from 17 sites in France and Belgium. Each RSV patient was matched to a flu patient according to institution and date of diagnosis.

The primary objective was a comparison of in-hospital mortality between the groups, defined as death from any cause during an index hospital stay in acute care. Secondary objectives were comparisons of the clinical and biological characteristics of patients with RSV versus flu.

Overall, in-hospital mortality was not significantly different between the RSV and influenza groups (23.9% vs. 25.6%, P = .63).

However, patients with RSV infection were significantly more likely than those with flu to have an underlying chronic respiratory condition (60.2% vs. 40.1%, P < .001) and to be immunocompromised (35% vs. 26.2%, P = .02). Very few of the patients overall (39 patients, 6.3%) were considered young and healthy prior to hospitalization; and significantly fewer of these were in the RSV group than in the influenza group (9 patients and 30 patients, respectively).

Airway obstruction at the time of diagnosis was significantly more common in the RSV patients than in influenza patients (49.5% vs. 39.5%, P = .01), but influenza patients were significantly more likely to have acute respiratory distress syndrome at the time of diagnosis (21.7% vs. 14.6%, P = .02). Rates of coinfections were similar between the groups, and approximately 60% of coinfected patients received at least 72 hours of therapeutic antibiotics. Overall length of hospital stay, ICU stay, and duration of mechanical ventilation were similar between the groups.

The results show that severe RSV occurs mainly in older patients with comorbidities, and these results reflect data from previous studies, the researchers wrote in their discussion. In addition, “patients with influenza infection were significantly more likely to have fever, myalgia, increased CPK level, thrombocytopenia and transaminitis at diagnosis than were those with RSV infection. Whether these differences may be used to guide patient management remains to be determined.”

The study findings were limited by several factors including the retrospective design, and testing for respiratory viruses on symptomatic patients only, rather than all ICU patients, the researchers noted. Other limitations include the inability to show a causal link between viral infections and patient outcomes and the heterogenous management of patients among different centers.

However, the results were strengthened by the large sample size and multivariate analysis, and support the need for interventions to prevent and treat severe RSV, they concluded.

The study received no outside funding. Lead author Dr. Coussement disclosed serving on advisory board for Sanofi.

Hospitalized intensive care patients with respiratory syncytial virus were significantly more likely to be immunocompromised and to have chronic respiratory conditions than those with influenza infections, but in-hospital mortality rates were similar, based on data from 618 adults.

Respiratory syncytial virus is common in adults, but characteristics of RSV patients requiring ICU care have not been explored, despite routine testing for RSV in critically ill patients in many institutions, Julien Coussement, PhD, of Université Libre de Bruxelles, Brussels, and colleagues wrote.

“Influenza is another respiratory virus routinely tested for in ICU patients with respiratory symptoms because of its well-known morbidity and mortality, but there are no data specifically comparing RSV and influenza infections in adult ICU patients,” they noted.

In a retrospective, multicenter study published in the journal CHEST, the researchers analyzed data from 309 adult ICU patients with RSV infection and 309 with influenza infection between November 2011 and April 2018 from 17 sites in France and Belgium. Each RSV patient was matched to a flu patient according to institution and date of diagnosis.

The primary objective was a comparison of in-hospital mortality between the groups, defined as death from any cause during an index hospital stay in acute care. Secondary objectives were comparisons of the clinical and biological characteristics of patients with RSV versus flu.

Overall, in-hospital mortality was not significantly different between the RSV and influenza groups (23.9% vs. 25.6%, P = .63).

However, patients with RSV infection were significantly more likely than those with flu to have an underlying chronic respiratory condition (60.2% vs. 40.1%, P < .001) and to be immunocompromised (35% vs. 26.2%, P = .02). Very few of the patients overall (39 patients, 6.3%) were considered young and healthy prior to hospitalization; and significantly fewer of these were in the RSV group than in the influenza group (9 patients and 30 patients, respectively).

Airway obstruction at the time of diagnosis was significantly more common in the RSV patients than in influenza patients (49.5% vs. 39.5%, P = .01), but influenza patients were significantly more likely to have acute respiratory distress syndrome at the time of diagnosis (21.7% vs. 14.6%, P = .02). Rates of coinfections were similar between the groups, and approximately 60% of coinfected patients received at least 72 hours of therapeutic antibiotics. Overall length of hospital stay, ICU stay, and duration of mechanical ventilation were similar between the groups.

The results show that severe RSV occurs mainly in older patients with comorbidities, and these results reflect data from previous studies, the researchers wrote in their discussion. In addition, “patients with influenza infection were significantly more likely to have fever, myalgia, increased CPK level, thrombocytopenia and transaminitis at diagnosis than were those with RSV infection. Whether these differences may be used to guide patient management remains to be determined.”

The study findings were limited by several factors including the retrospective design, and testing for respiratory viruses on symptomatic patients only, rather than all ICU patients, the researchers noted. Other limitations include the inability to show a causal link between viral infections and patient outcomes and the heterogenous management of patients among different centers.

However, the results were strengthened by the large sample size and multivariate analysis, and support the need for interventions to prevent and treat severe RSV, they concluded.

The study received no outside funding. Lead author Dr. Coussement disclosed serving on advisory board for Sanofi.

Health authorities in California, Texas, and Kansas have reported cases of “flurona,” in which people have seasonal flu and COVID-19 at the same time.

The first known case was detected in Israel, but until the first week of January no cases had been reported in the United States.

In Los Angeles, a teenaged boy tested positive for both illnesses at a COVID testing site in Brentwood, the Los Angeles Times reported. The child’s mother tested positive for COVID the next day.

“This is the first one that we’re aware of,” Steve Farzam, chief operating officer of 911 COVID Testing, told the LA Times. “In and of itself, it’s not overly concerning; however, it is concerning and can be problematic for someone who has pre-existing medical conditions, anyone who is immunocompromised.”

The teen and his family of five had just returned from vacation in Cabo San Lucas, Mexico. All said they tested negative before the trip, but they tested again when they got home because one of the children had a runny nose, Mr. Farzam said.

The boy, who had not been vaccinated for COVID or the flu, doesn’t have serious symptoms and is recovering at home.

In Houston, a 17-year-old boy, his siblings, and his father felt sick a few days before Christmas and went in for testing, TV station KTRK reported. The teen tested positive for both the flu and COVID.

“I ended up getting tested the day before Christmas for strep throat, flu and COVID,” the teenager, Alec Zierlein, told KTRK. “I didn’t think I had any of the three. It felt like a mild cold.”

Health officials reported Jan. 5 that a flurona case was detected in Hays, Kan., TV station WIBW reported. The patient was being treated in the ICU. No other details were provided. In Israel, flurona was first found in an unvaccinated pregnant woman at Rabin Medical Center in Petach Tikva, according to the Times of Israel. She tested positive for both viruses when she arrived at the medical center, and doctors double-checked to confirm her diagnosis. The woman had mild symptoms and was released in good condition, the news outlet reported.

Public health officials in Israel said they are concerned that an increase in both viruses at the same time could lead to many hospitalizations.

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

Health authorities in California, Texas, and Kansas have reported cases of “flurona,” in which people have seasonal flu and COVID-19 at the same time.

The first known case was detected in Israel, but until the first week of January no cases had been reported in the United States.

In Los Angeles, a teenaged boy tested positive for both illnesses at a COVID testing site in Brentwood, the Los Angeles Times reported. The child’s mother tested positive for COVID the next day.

“This is the first one that we’re aware of,” Steve Farzam, chief operating officer of 911 COVID Testing, told the LA Times. “In and of itself, it’s not overly concerning; however, it is concerning and can be problematic for someone who has pre-existing medical conditions, anyone who is immunocompromised.”

The teen and his family of five had just returned from vacation in Cabo San Lucas, Mexico. All said they tested negative before the trip, but they tested again when they got home because one of the children had a runny nose, Mr. Farzam said.

The boy, who had not been vaccinated for COVID or the flu, doesn’t have serious symptoms and is recovering at home.

In Houston, a 17-year-old boy, his siblings, and his father felt sick a few days before Christmas and went in for testing, TV station KTRK reported. The teen tested positive for both the flu and COVID.

“I ended up getting tested the day before Christmas for strep throat, flu and COVID,” the teenager, Alec Zierlein, told KTRK. “I didn’t think I had any of the three. It felt like a mild cold.”

Health officials reported Jan. 5 that a flurona case was detected in Hays, Kan., TV station WIBW reported. The patient was being treated in the ICU. No other details were provided. In Israel, flurona was first found in an unvaccinated pregnant woman at Rabin Medical Center in Petach Tikva, according to the Times of Israel. She tested positive for both viruses when she arrived at the medical center, and doctors double-checked to confirm her diagnosis. The woman had mild symptoms and was released in good condition, the news outlet reported.

Public health officials in Israel said they are concerned that an increase in both viruses at the same time could lead to many hospitalizations.

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

Health authorities in California, Texas, and Kansas have reported cases of “flurona,” in which people have seasonal flu and COVID-19 at the same time.

The first known case was detected in Israel, but until the first week of January no cases had been reported in the United States.

In Los Angeles, a teenaged boy tested positive for both illnesses at a COVID testing site in Brentwood, the Los Angeles Times reported. The child’s mother tested positive for COVID the next day.

“This is the first one that we’re aware of,” Steve Farzam, chief operating officer of 911 COVID Testing, told the LA Times. “In and of itself, it’s not overly concerning; however, it is concerning and can be problematic for someone who has pre-existing medical conditions, anyone who is immunocompromised.”

The teen and his family of five had just returned from vacation in Cabo San Lucas, Mexico. All said they tested negative before the trip, but they tested again when they got home because one of the children had a runny nose, Mr. Farzam said.

The boy, who had not been vaccinated for COVID or the flu, doesn’t have serious symptoms and is recovering at home.

In Houston, a 17-year-old boy, his siblings, and his father felt sick a few days before Christmas and went in for testing, TV station KTRK reported. The teen tested positive for both the flu and COVID.

“I ended up getting tested the day before Christmas for strep throat, flu and COVID,” the teenager, Alec Zierlein, told KTRK. “I didn’t think I had any of the three. It felt like a mild cold.”

Health officials reported Jan. 5 that a flurona case was detected in Hays, Kan., TV station WIBW reported. The patient was being treated in the ICU. No other details were provided. In Israel, flurona was first found in an unvaccinated pregnant woman at Rabin Medical Center in Petach Tikva, according to the Times of Israel. She tested positive for both viruses when she arrived at the medical center, and doctors double-checked to confirm her diagnosis. The woman had mild symptoms and was released in good condition, the news outlet reported.

Public health officials in Israel said they are concerned that an increase in both viruses at the same time could lead to many hospitalizations.

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

A new survey from the National Foundation for Infectious Diseases shows that, despite the recommendation that patients who have chronic illnesses receive annual flu vaccines, only 45% of these patients do get them. People with chronic diseases are at increased risk for serious flu-related complications, including hospitalization and death.

MarianVejcik/Getty Images

The survey looked at physicians’ practices toward flu vaccination and communication between health care providers (HCP) and their adult patients with chronic health conditions.

Overall, less than a third of HCPs (31%) said they recommend annual flu vaccination to all of their patients with chronic health conditions. There were some surprising differences between subspecialists. For example, 72% of patients with a heart problem who saw a cardiologist said that physician recommended the flu vaccine. The recommendation rate dropped to 32% of lung patients seeing a pulmonary physician and only 10% of people with diabetes who saw an endocrinologist.

There is quite a large gap between what physicians and patients say about their interactions. Fully 77% of HCPs who recommend annual flu vaccination say they tell patients when they are at higher risk of complications from influenza. Yet only 48% of patients say they have been given such information.

Although it is critically important information for patients to learn, their risk of influenza is often missing from the discussion. For example, patients with heart disease are six times more likely to have a heart attack within 7 days of flu infection. People with diabetes are six times more likely to be hospitalized from flu and three times more likely to die. Similarly, those with asthma or chronic obstructive pulmonary disorder are at a much higher risk of complications.

One problem is that more than half of specialist physicians who do not offer flu vaccinations report that it is because they believe that immunizations are the responsibility of the primary care physician. Yet only 65% of patients with one of these chronic illnesses report seeing their primary care physician at least annually.

Much of the disparity between the patient’s perception of what they were told and the physician’s is “how the ‘recommendation’ is actually made,” William Schaffner, MD, NFID’s medical director and professor of medicine at Vanderbilt University, Nashville, Tenn., told this news organization. Dr. Schaffner offered the following example: At the end of the visit, the doctor might say: “It’s that time of the year again – you want to think about getting your flu shot.”

“The doctor thinks they’ve recommended that, but the doctor really has opened the door for you to think about it and leave [yourself] unvaccinated.”

Dr. Schaffner’s alternative? Tell the patient: “‘You’ll get your flu vaccine on the way out. Tom or Sally will give it to you.’ That’s a very different kind of recommendation. And it’s a much greater assurance of providing the vaccine.”

Another major problem, Dr. Schaffner said, is that many specialists “don’t think of vaccination as something that’s included with their routine care” even though they do direct much of the patient’s care. He said that physicians should be more “directive” in their care and that immunizations should be better integrated into routine practice.

Jody Lanard, MD, a retired risk communication consultant who spent many years working with the World Health Organization on disease outbreak communications, said in an interview that this disconnect between physician and patient reports “was really jarring. And it’s actionable!”

She offered several practical suggestions. For one, she said, “the messaging to the specialists has to be very, very empathic. We know you’re already overburdened. And here we’re asking you to do something that you think of as somebody else’s job.” But if your patient gets flu, then your job as the cardiologist or endocrinologist will become more complicated and time-consuming. So getting the patients vaccinated will be a good investment and will make your job easier.

Because of the disparity in patient and physician reports, Dr. Lanard suggested implementing a “feedback mechanism where they [the health care providers] give out the prescription, and then the office calls [the patient] to see if they’ve gotten the shot or not. Because that way it will help correct the mismatch between them thinking that they told the patient and the patient not hearing it.”

Asked about why there might be a big gap between what physicians report they said and what patients heard, Dr. Lanard explained that “physicians often communicate in [a manner] sort of like a checklist. And the patients are focused on one or two things that are high in their minds. And the physician was mentioning some things that are on a separate topic that are not on a patient’s list and it goes right past them.”

Dr. Lanard recommended brief storytelling instead of checklists. For example: “I’ve been treating your diabetes for 10 years. During this last flu season, several of my diabetic patients had a really hard time when they caught the flu. So now I’m trying harder to remember to remind you to get your flu shots.”

She urged HCPs to “make it more personal ... but it can still be scripted in advance as part of something that [you’re] remembering to do during the check.” She added that their professional associations may be able to send them suggested language they can adapt.

Finally, Dr. Lanard cautioned about vaccine myths. “The word myth is so insulting. It’s basically a word that sends the signal that you’re an idiot.”

She advised specialists to avoid the word “myth,” which will make the person defensive. Instead, say something like, “A lot of people, even some of my own family members, think the flu vaccine gives you the flu. ... But it doesn’t. And then you go into the reality.”

Dr. Lanard suggested that specialists implement the follow-up calls and close the feedback loop, saying: “If they did the survey a few years later, I bet that gap would narrow.”

Dr. Schaffner and Dr. Lanard disclosed no relevant financial relationships.

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

A new survey from the National Foundation for Infectious Diseases shows that, despite the recommendation that patients who have chronic illnesses receive annual flu vaccines, only 45% of these patients do get them. People with chronic diseases are at increased risk for serious flu-related complications, including hospitalization and death.

MarianVejcik/Getty Images

The survey looked at physicians’ practices toward flu vaccination and communication between health care providers (HCP) and their adult patients with chronic health conditions.

Overall, less than a third of HCPs (31%) said they recommend annual flu vaccination to all of their patients with chronic health conditions. There were some surprising differences between subspecialists. For example, 72% of patients with a heart problem who saw a cardiologist said that physician recommended the flu vaccine. The recommendation rate dropped to 32% of lung patients seeing a pulmonary physician and only 10% of people with diabetes who saw an endocrinologist.

There is quite a large gap between what physicians and patients say about their interactions. Fully 77% of HCPs who recommend annual flu vaccination say they tell patients when they are at higher risk of complications from influenza. Yet only 48% of patients say they have been given such information.

Although it is critically important information for patients to learn, their risk of influenza is often missing from the discussion. For example, patients with heart disease are six times more likely to have a heart attack within 7 days of flu infection. People with diabetes are six times more likely to be hospitalized from flu and three times more likely to die. Similarly, those with asthma or chronic obstructive pulmonary disorder are at a much higher risk of complications.

One problem is that more than half of specialist physicians who do not offer flu vaccinations report that it is because they believe that immunizations are the responsibility of the primary care physician. Yet only 65% of patients with one of these chronic illnesses report seeing their primary care physician at least annually.

Much of the disparity between the patient’s perception of what they were told and the physician’s is “how the ‘recommendation’ is actually made,” William Schaffner, MD, NFID’s medical director and professor of medicine at Vanderbilt University, Nashville, Tenn., told this news organization. Dr. Schaffner offered the following example: At the end of the visit, the doctor might say: “It’s that time of the year again – you want to think about getting your flu shot.”

“The doctor thinks they’ve recommended that, but the doctor really has opened the door for you to think about it and leave [yourself] unvaccinated.”

Dr. Schaffner’s alternative? Tell the patient: “‘You’ll get your flu vaccine on the way out. Tom or Sally will give it to you.’ That’s a very different kind of recommendation. And it’s a much greater assurance of providing the vaccine.”

Another major problem, Dr. Schaffner said, is that many specialists “don’t think of vaccination as something that’s included with their routine care” even though they do direct much of the patient’s care. He said that physicians should be more “directive” in their care and that immunizations should be better integrated into routine practice.

Jody Lanard, MD, a retired risk communication consultant who spent many years working with the World Health Organization on disease outbreak communications, said in an interview that this disconnect between physician and patient reports “was really jarring. And it’s actionable!”

She offered several practical suggestions. For one, she said, “the messaging to the specialists has to be very, very empathic. We know you’re already overburdened. And here we’re asking you to do something that you think of as somebody else’s job.” But if your patient gets flu, then your job as the cardiologist or endocrinologist will become more complicated and time-consuming. So getting the patients vaccinated will be a good investment and will make your job easier.

Because of the disparity in patient and physician reports, Dr. Lanard suggested implementing a “feedback mechanism where they [the health care providers] give out the prescription, and then the office calls [the patient] to see if they’ve gotten the shot or not. Because that way it will help correct the mismatch between them thinking that they told the patient and the patient not hearing it.”

Asked about why there might be a big gap between what physicians report they said and what patients heard, Dr. Lanard explained that “physicians often communicate in [a manner] sort of like a checklist. And the patients are focused on one or two things that are high in their minds. And the physician was mentioning some things that are on a separate topic that are not on a patient’s list and it goes right past them.”

Dr. Lanard recommended brief storytelling instead of checklists. For example: “I’ve been treating your diabetes for 10 years. During this last flu season, several of my diabetic patients had a really hard time when they caught the flu. So now I’m trying harder to remember to remind you to get your flu shots.”

She urged HCPs to “make it more personal ... but it can still be scripted in advance as part of something that [you’re] remembering to do during the check.” She added that their professional associations may be able to send them suggested language they can adapt.

Finally, Dr. Lanard cautioned about vaccine myths. “The word myth is so insulting. It’s basically a word that sends the signal that you’re an idiot.”

She advised specialists to avoid the word “myth,” which will make the person defensive. Instead, say something like, “A lot of people, even some of my own family members, think the flu vaccine gives you the flu. ... But it doesn’t. And then you go into the reality.”

Dr. Lanard suggested that specialists implement the follow-up calls and close the feedback loop, saying: “If they did the survey a few years later, I bet that gap would narrow.”

Dr. Schaffner and Dr. Lanard disclosed no relevant financial relationships.

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

A new survey from the National Foundation for Infectious Diseases shows that, despite the recommendation that patients who have chronic illnesses receive annual flu vaccines, only 45% of these patients do get them. People with chronic diseases are at increased risk for serious flu-related complications, including hospitalization and death.

MarianVejcik/Getty Images

The survey looked at physicians’ practices toward flu vaccination and communication between health care providers (HCP) and their adult patients with chronic health conditions.

Overall, less than a third of HCPs (31%) said they recommend annual flu vaccination to all of their patients with chronic health conditions. There were some surprising differences between subspecialists. For example, 72% of patients with a heart problem who saw a cardiologist said that physician recommended the flu vaccine. The recommendation rate dropped to 32% of lung patients seeing a pulmonary physician and only 10% of people with diabetes who saw an endocrinologist.

There is quite a large gap between what physicians and patients say about their interactions. Fully 77% of HCPs who recommend annual flu vaccination say they tell patients when they are at higher risk of complications from influenza. Yet only 48% of patients say they have been given such information.

Although it is critically important information for patients to learn, their risk of influenza is often missing from the discussion. For example, patients with heart disease are six times more likely to have a heart attack within 7 days of flu infection. People with diabetes are six times more likely to be hospitalized from flu and three times more likely to die. Similarly, those with asthma or chronic obstructive pulmonary disorder are at a much higher risk of complications.

One problem is that more than half of specialist physicians who do not offer flu vaccinations report that it is because they believe that immunizations are the responsibility of the primary care physician. Yet only 65% of patients with one of these chronic illnesses report seeing their primary care physician at least annually.

Much of the disparity between the patient’s perception of what they were told and the physician’s is “how the ‘recommendation’ is actually made,” William Schaffner, MD, NFID’s medical director and professor of medicine at Vanderbilt University, Nashville, Tenn., told this news organization. Dr. Schaffner offered the following example: At the end of the visit, the doctor might say: “It’s that time of the year again – you want to think about getting your flu shot.”

“The doctor thinks they’ve recommended that, but the doctor really has opened the door for you to think about it and leave [yourself] unvaccinated.”

Dr. Schaffner’s alternative? Tell the patient: “‘You’ll get your flu vaccine on the way out. Tom or Sally will give it to you.’ That’s a very different kind of recommendation. And it’s a much greater assurance of providing the vaccine.”

Another major problem, Dr. Schaffner said, is that many specialists “don’t think of vaccination as something that’s included with their routine care” even though they do direct much of the patient’s care. He said that physicians should be more “directive” in their care and that immunizations should be better integrated into routine practice.

Jody Lanard, MD, a retired risk communication consultant who spent many years working with the World Health Organization on disease outbreak communications, said in an interview that this disconnect between physician and patient reports “was really jarring. And it’s actionable!”

She offered several practical suggestions. For one, she said, “the messaging to the specialists has to be very, very empathic. We know you’re already overburdened. And here we’re asking you to do something that you think of as somebody else’s job.” But if your patient gets flu, then your job as the cardiologist or endocrinologist will become more complicated and time-consuming. So getting the patients vaccinated will be a good investment and will make your job easier.

Because of the disparity in patient and physician reports, Dr. Lanard suggested implementing a “feedback mechanism where they [the health care providers] give out the prescription, and then the office calls [the patient] to see if they’ve gotten the shot or not. Because that way it will help correct the mismatch between them thinking that they told the patient and the patient not hearing it.”

Asked about why there might be a big gap between what physicians report they said and what patients heard, Dr. Lanard explained that “physicians often communicate in [a manner] sort of like a checklist. And the patients are focused on one or two things that are high in their minds. And the physician was mentioning some things that are on a separate topic that are not on a patient’s list and it goes right past them.”

Dr. Lanard recommended brief storytelling instead of checklists. For example: “I’ve been treating your diabetes for 10 years. During this last flu season, several of my diabetic patients had a really hard time when they caught the flu. So now I’m trying harder to remember to remind you to get your flu shots.”

She urged HCPs to “make it more personal ... but it can still be scripted in advance as part of something that [you’re] remembering to do during the check.” She added that their professional associations may be able to send them suggested language they can adapt.

Finally, Dr. Lanard cautioned about vaccine myths. “The word myth is so insulting. It’s basically a word that sends the signal that you’re an idiot.”

She advised specialists to avoid the word “myth,” which will make the person defensive. Instead, say something like, “A lot of people, even some of my own family members, think the flu vaccine gives you the flu. ... But it doesn’t. And then you go into the reality.”

Dr. Lanard suggested that specialists implement the follow-up calls and close the feedback loop, saying: “If they did the survey a few years later, I bet that gap would narrow.”

Dr. Schaffner and Dr. Lanard disclosed no relevant financial relationships.

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

Influenza infection is linked to a subsequent diagnosis of Parkinson’s disease (PD) more than 10 years later, resurfacing a long-held debate about whether infection increases the risk for movement disorders over the long term.

In a large case-control study, investigators found the odds of PD were elevated by approximately 90% for PD that occurred more than 15 years after influenza infection and by more than 70% for PD occurring more than 10 years after the flu.

“This study is not definitive by any means, but it certainly suggests there are potential long-term consequences from influenza,” study investigator Noelle M. Cocoros, DSc, research scientist at Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, said in an interview.

The study was published online Oct. 25 in JAMA Neurology.

Ongoing debate

The debate about whether influenza is associated with PD has been going on as far back as the 1918 influenza pandemic, when experts documented parkinsonism in affected individuals.

Using data from the Danish patient registry, researchers identified 10,271 subjects diagnosed with PD during a 17-year period (2000-2016). Of these, 38.7% were female, and the mean age was 71.4 years.

They matched these subjects for age and sex to 51,355 controls without PD. Compared with controls, slightly fewer individuals with PD had chronic obstructive pulmonary disease (COPD) or emphysema, but there was a similar distribution of cardiovascular disease and various other conditions.

Researchers collected data on influenza diagnoses from inpatient and outpatient hospital clinics from 1977 to 2016. They plotted these by month and year on a graph, calculated the median number of diagnoses per month, and identified peaks as those with more than threefold the median.

They categorized cases in groups related to the time between the infection and PD: More than 10 years, 10-15 years, and more than 15 years.

The time lapse accounts for a rather long “run-up” to PD, said Dr. Cocoros. There’s a sometimes decades-long preclinical phase before patients develop typical motor signs and a prodromal phase where they may present with nonmotor symptoms such as sleep disorders and constipation.

“We expected there would be at least 10 years between any infection and PD if there was an association present,” said Dr. Cocoros.

Investigators found an association between influenza exposure and PD diagnosis “that held up over time,” she said.

For more than 10 years before PD, the likelihood of a diagnosis for the infected compared with the unexposed was increased 73% (odds ratio [OR] 1.73; 95% confidence interval, 1.11-2.71; P = .02) after adjustment for cardiovascular disease, diabetes, chronic obstructive pulmonary disease, emphysema, lung cancer, Crohn’s disease, and ulcerative colitis.

The odds increased with more time from infection. For more than 15 years, the adjusted OR was 1.91 (95% CI, 1.14 - 3.19; P =.01).

However, for the 10- to 15-year time frame, the point estimate was reduced and the CI nonsignificant (OR, 1.33; 95% CI, 0.54-3.27; P = .53). This “is a little hard to interpret,” but could be a result of the small numbers, exposure misclassification, or because “the longer time interval is what’s meaningful,” said Dr. Cocoros.
 

Potential COVID-19–related PD surge?

In a sensitivity analysis, researchers looked at peak infection activity. “We wanted to increase the likelihood of these diagnoses representing actual infection,” Dr. Cocoros noted.

Here, the OR was still elevated at more than 10 years, but the CI was quite wide and included 1 (OR, 1.52; 95% CI, 0.80-2.89; P = .21). “So the association holds up, but the estimates are quite unstable,” said Dr. Cocoros.

Researchers examined associations with numerous other infection types, but did not see the same trend over time. Some infections – for example, gastrointestinal infections and septicemia – were associated with PD within 5 years, but most associations appeared to be null after more than 10 years.

“There seemed to be associations earlier between the infection and PD, which we interpret to suggest there’s actually not a meaningful association,” said Dr. Cocoros.

An exception might be urinary tract infections (UTIs), where after 10 years, the adjusted OR was 1.19 (95% CI, 1.01-1.40). Research suggests patients with PD often have UTIs and neurogenic bladder.

“It’s possible that UTIs could be an early symptom of PD rather than a causative factor,” said Dr. Cocoros.

It’s unclear how influenza might lead to PD but it could be that the virus gets into the central nervous system, resulting in neuroinflammation. Cytokines generated in response to the influenza infection might damage the brain.

“The infection could be a ‘primer’ or an initial ‘hit’ to the system, maybe setting people up for PD,” said Dr. Cocoros.

As for the current COVID-19 pandemic, some experts are concerned about a potential surge in PD cases in decades to come, and are calling for prospective monitoring of patients with this infection, said Dr. Cocoros.

However, she noted that infections don’t account for all PD cases and that genetic and environmental factors also influence risk.

Many individuals who contract influenza don’t seek medical care or get tested, so it’s possible the study counted those who had the infection as unexposed. Another potential study limitation was that small numbers for some infections, for example, Helicobacter pylori and hepatitis C, limited the ability to interpret results.
 

‘Exciting and important’ findings

Commenting on the research for this news organization, Aparna Wagle Shukla, MD, professor, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, said the results amid the current pandemic are “exciting and important” and “have reinvigorated interest” in the role of infection in PD.

However, the study had some limitations, an important one being lack of accounting for confounding factors, including environmental factors, she said. Exposure to pesticides, living in a rural area, drinking well water, and having had a head injury may increase PD risk, whereas high intake of caffeine, nicotine, alcohol, and nonsteroidal anti-inflammatory drugs might lower the risk.

The researchers did not take into account exposure to multiple microbes or “infection burden,” said Dr. Wagle Shukla, who was not involved in the current study. In addition, as the data are from a single country with exposure to specific influenza strains, application of the findings elsewhere may be limited.

Dr. Wagle Shukla noted that a case-control design “isn’t ideal” from an epidemiological perspective. “Future studies should involve large cohorts followed longitudinally.”

The study was supported by grants from the Lundbeck Foundation and the Augustinus Foundation. Dr. Cocoros has disclosed no relevant financial relationships. Several coauthors have disclosed relationships with industry. The full list can be found with the original article.

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

Influenza infection is linked to a subsequent diagnosis of Parkinson’s disease (PD) more than 10 years later, resurfacing a long-held debate about whether infection increases the risk for movement disorders over the long term.

In a large case-control study, investigators found the odds of PD were elevated by approximately 90% for PD that occurred more than 15 years after influenza infection and by more than 70% for PD occurring more than 10 years after the flu.

“This study is not definitive by any means, but it certainly suggests there are potential long-term consequences from influenza,” study investigator Noelle M. Cocoros, DSc, research scientist at Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, said in an interview.

The study was published online Oct. 25 in JAMA Neurology.

Ongoing debate

The debate about whether influenza is associated with PD has been going on as far back as the 1918 influenza pandemic, when experts documented parkinsonism in affected individuals.

Using data from the Danish patient registry, researchers identified 10,271 subjects diagnosed with PD during a 17-year period (2000-2016). Of these, 38.7% were female, and the mean age was 71.4 years.

They matched these subjects for age and sex to 51,355 controls without PD. Compared with controls, slightly fewer individuals with PD had chronic obstructive pulmonary disease (COPD) or emphysema, but there was a similar distribution of cardiovascular disease and various other conditions.

Researchers collected data on influenza diagnoses from inpatient and outpatient hospital clinics from 1977 to 2016. They plotted these by month and year on a graph, calculated the median number of diagnoses per month, and identified peaks as those with more than threefold the median.

They categorized cases in groups related to the time between the infection and PD: More than 10 years, 10-15 years, and more than 15 years.

The time lapse accounts for a rather long “run-up” to PD, said Dr. Cocoros. There’s a sometimes decades-long preclinical phase before patients develop typical motor signs and a prodromal phase where they may present with nonmotor symptoms such as sleep disorders and constipation.

“We expected there would be at least 10 years between any infection and PD if there was an association present,” said Dr. Cocoros.

Investigators found an association between influenza exposure and PD diagnosis “that held up over time,” she said.

For more than 10 years before PD, the likelihood of a diagnosis for the infected compared with the unexposed was increased 73% (odds ratio [OR] 1.73; 95% confidence interval, 1.11-2.71; P = .02) after adjustment for cardiovascular disease, diabetes, chronic obstructive pulmonary disease, emphysema, lung cancer, Crohn’s disease, and ulcerative colitis.

The odds increased with more time from infection. For more than 15 years, the adjusted OR was 1.91 (95% CI, 1.14 - 3.19; P =.01).

However, for the 10- to 15-year time frame, the point estimate was reduced and the CI nonsignificant (OR, 1.33; 95% CI, 0.54-3.27; P = .53). This “is a little hard to interpret,” but could be a result of the small numbers, exposure misclassification, or because “the longer time interval is what’s meaningful,” said Dr. Cocoros.
 

Potential COVID-19–related PD surge?

In a sensitivity analysis, researchers looked at peak infection activity. “We wanted to increase the likelihood of these diagnoses representing actual infection,” Dr. Cocoros noted.

Here, the OR was still elevated at more than 10 years, but the CI was quite wide and included 1 (OR, 1.52; 95% CI, 0.80-2.89; P = .21). “So the association holds up, but the estimates are quite unstable,” said Dr. Cocoros.

Researchers examined associations with numerous other infection types, but did not see the same trend over time. Some infections – for example, gastrointestinal infections and septicemia – were associated with PD within 5 years, but most associations appeared to be null after more than 10 years.

“There seemed to be associations earlier between the infection and PD, which we interpret to suggest there’s actually not a meaningful association,” said Dr. Cocoros.

An exception might be urinary tract infections (UTIs), where after 10 years, the adjusted OR was 1.19 (95% CI, 1.01-1.40). Research suggests patients with PD often have UTIs and neurogenic bladder.

“It’s possible that UTIs could be an early symptom of PD rather than a causative factor,” said Dr. Cocoros.

It’s unclear how influenza might lead to PD but it could be that the virus gets into the central nervous system, resulting in neuroinflammation. Cytokines generated in response to the influenza infection might damage the brain.

“The infection could be a ‘primer’ or an initial ‘hit’ to the system, maybe setting people up for PD,” said Dr. Cocoros.

As for the current COVID-19 pandemic, some experts are concerned about a potential surge in PD cases in decades to come, and are calling for prospective monitoring of patients with this infection, said Dr. Cocoros.

However, she noted that infections don’t account for all PD cases and that genetic and environmental factors also influence risk.

Many individuals who contract influenza don’t seek medical care or get tested, so it’s possible the study counted those who had the infection as unexposed. Another potential study limitation was that small numbers for some infections, for example, Helicobacter pylori and hepatitis C, limited the ability to interpret results.
 

‘Exciting and important’ findings

Commenting on the research for this news organization, Aparna Wagle Shukla, MD, professor, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, said the results amid the current pandemic are “exciting and important” and “have reinvigorated interest” in the role of infection in PD.

However, the study had some limitations, an important one being lack of accounting for confounding factors, including environmental factors, she said. Exposure to pesticides, living in a rural area, drinking well water, and having had a head injury may increase PD risk, whereas high intake of caffeine, nicotine, alcohol, and nonsteroidal anti-inflammatory drugs might lower the risk.

The researchers did not take into account exposure to multiple microbes or “infection burden,” said Dr. Wagle Shukla, who was not involved in the current study. In addition, as the data are from a single country with exposure to specific influenza strains, application of the findings elsewhere may be limited.

Dr. Wagle Shukla noted that a case-control design “isn’t ideal” from an epidemiological perspective. “Future studies should involve large cohorts followed longitudinally.”

The study was supported by grants from the Lundbeck Foundation and the Augustinus Foundation. Dr. Cocoros has disclosed no relevant financial relationships. Several coauthors have disclosed relationships with industry. The full list can be found with the original article.

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

Influenza infection is linked to a subsequent diagnosis of Parkinson’s disease (PD) more than 10 years later, resurfacing a long-held debate about whether infection increases the risk for movement disorders over the long term.

In a large case-control study, investigators found the odds of PD were elevated by approximately 90% for PD that occurred more than 15 years after influenza infection and by more than 70% for PD occurring more than 10 years after the flu.

“This study is not definitive by any means, but it certainly suggests there are potential long-term consequences from influenza,” study investigator Noelle M. Cocoros, DSc, research scientist at Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, said in an interview.

The study was published online Oct. 25 in JAMA Neurology.

Ongoing debate

The debate about whether influenza is associated with PD has been going on as far back as the 1918 influenza pandemic, when experts documented parkinsonism in affected individuals.

Using data from the Danish patient registry, researchers identified 10,271 subjects diagnosed with PD during a 17-year period (2000-2016). Of these, 38.7% were female, and the mean age was 71.4 years.

They matched these subjects for age and sex to 51,355 controls without PD. Compared with controls, slightly fewer individuals with PD had chronic obstructive pulmonary disease (COPD) or emphysema, but there was a similar distribution of cardiovascular disease and various other conditions.

Researchers collected data on influenza diagnoses from inpatient and outpatient hospital clinics from 1977 to 2016. They plotted these by month and year on a graph, calculated the median number of diagnoses per month, and identified peaks as those with more than threefold the median.

They categorized cases in groups related to the time between the infection and PD: More than 10 years, 10-15 years, and more than 15 years.

The time lapse accounts for a rather long “run-up” to PD, said Dr. Cocoros. There’s a sometimes decades-long preclinical phase before patients develop typical motor signs and a prodromal phase where they may present with nonmotor symptoms such as sleep disorders and constipation.

“We expected there would be at least 10 years between any infection and PD if there was an association present,” said Dr. Cocoros.

Investigators found an association between influenza exposure and PD diagnosis “that held up over time,” she said.

For more than 10 years before PD, the likelihood of a diagnosis for the infected compared with the unexposed was increased 73% (odds ratio [OR] 1.73; 95% confidence interval, 1.11-2.71; P = .02) after adjustment for cardiovascular disease, diabetes, chronic obstructive pulmonary disease, emphysema, lung cancer, Crohn’s disease, and ulcerative colitis.

The odds increased with more time from infection. For more than 15 years, the adjusted OR was 1.91 (95% CI, 1.14 - 3.19; P =.01).

However, for the 10- to 15-year time frame, the point estimate was reduced and the CI nonsignificant (OR, 1.33; 95% CI, 0.54-3.27; P = .53). This “is a little hard to interpret,” but could be a result of the small numbers, exposure misclassification, or because “the longer time interval is what’s meaningful,” said Dr. Cocoros.
 

Potential COVID-19–related PD surge?

In a sensitivity analysis, researchers looked at peak infection activity. “We wanted to increase the likelihood of these diagnoses representing actual infection,” Dr. Cocoros noted.

Here, the OR was still elevated at more than 10 years, but the CI was quite wide and included 1 (OR, 1.52; 95% CI, 0.80-2.89; P = .21). “So the association holds up, but the estimates are quite unstable,” said Dr. Cocoros.

Researchers examined associations with numerous other infection types, but did not see the same trend over time. Some infections – for example, gastrointestinal infections and septicemia – were associated with PD within 5 years, but most associations appeared to be null after more than 10 years.

“There seemed to be associations earlier between the infection and PD, which we interpret to suggest there’s actually not a meaningful association,” said Dr. Cocoros.

An exception might be urinary tract infections (UTIs), where after 10 years, the adjusted OR was 1.19 (95% CI, 1.01-1.40). Research suggests patients with PD often have UTIs and neurogenic bladder.

“It’s possible that UTIs could be an early symptom of PD rather than a causative factor,” said Dr. Cocoros.

It’s unclear how influenza might lead to PD but it could be that the virus gets into the central nervous system, resulting in neuroinflammation. Cytokines generated in response to the influenza infection might damage the brain.

“The infection could be a ‘primer’ or an initial ‘hit’ to the system, maybe setting people up for PD,” said Dr. Cocoros.

As for the current COVID-19 pandemic, some experts are concerned about a potential surge in PD cases in decades to come, and are calling for prospective monitoring of patients with this infection, said Dr. Cocoros.

However, she noted that infections don’t account for all PD cases and that genetic and environmental factors also influence risk.

Many individuals who contract influenza don’t seek medical care or get tested, so it’s possible the study counted those who had the infection as unexposed. Another potential study limitation was that small numbers for some infections, for example, Helicobacter pylori and hepatitis C, limited the ability to interpret results.
 

‘Exciting and important’ findings

Commenting on the research for this news organization, Aparna Wagle Shukla, MD, professor, Norman Fixel Institute for Neurological Diseases, University of Florida, Gainesville, said the results amid the current pandemic are “exciting and important” and “have reinvigorated interest” in the role of infection in PD.

However, the study had some limitations, an important one being lack of accounting for confounding factors, including environmental factors, she said. Exposure to pesticides, living in a rural area, drinking well water, and having had a head injury may increase PD risk, whereas high intake of caffeine, nicotine, alcohol, and nonsteroidal anti-inflammatory drugs might lower the risk.

The researchers did not take into account exposure to multiple microbes or “infection burden,” said Dr. Wagle Shukla, who was not involved in the current study. In addition, as the data are from a single country with exposure to specific influenza strains, application of the findings elsewhere may be limited.

Dr. Wagle Shukla noted that a case-control design “isn’t ideal” from an epidemiological perspective. “Future studies should involve large cohorts followed longitudinally.”

The study was supported by grants from the Lundbeck Foundation and the Augustinus Foundation. Dr. Cocoros has disclosed no relevant financial relationships. Several coauthors have disclosed relationships with industry. The full list can be found with the original article.

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

The Food and Drug Administration has approved the Flucelvax quadrivalent vaccine for use in children aged 6 months and older, according to a statement from manufacturer Seqirus.

“This approval officially allows all eligible Americans to receive a cell-based influenza vaccine, increasing the potential for greater vaccine effectiveness,” according to the company.

The Centers for Disease Control and Prevention currently recommends annual influenza vaccination for all individuals aged 6 months and older without contraindications.

Flucelvax is manufactured using a cell-based process that yields a more precise match to the WHO-selected influenza strains for a given year. This process avoids the variation associated with traditional egg-based vaccines, and offers the potential for greater vaccine effectiveness, according to the company.

The approval was based in part on data from a phase 3 randomized, controlled noninferiority study of children aged 6-47 months. The data are the first for a cell-based flu vaccine in this age group, and were presented at the Pediatric Academic Societies meeting in 2021.

In the immunogenicity study of children aged 6 months through 3 years, described in the package insert, 1,597 children received Flucelvax quadrivalent and 805 received a control quadrivalent vaccine. After 28 days, Flucelvax showed noninferiority to the control quadrivalent against four influenza strains.

The most common side effects with Flucelvax quadrivalent vaccine overall are pain, redness, swelling, or a hardened area at the injection site, headache, low energy, muscle aches, and malaise. Additional side effects reported in children include tenderness or bruising at the injection site, sleepiness, diarrhea, changes in eating habits, and irritability. The vaccine is contraindicated for individuals with allergies to any of its ingredients.

Additional efficacy data on Flucelvax for children and adolescents aged 2-18 years were recently published in The New England Journal of Medicine.

Full prescribing information for Flucelvax is available here.

The FDA approval letter is available here.[email protected]

The Food and Drug Administration has approved the Flucelvax quadrivalent vaccine for use in children aged 6 months and older, according to a statement from manufacturer Seqirus.

“This approval officially allows all eligible Americans to receive a cell-based influenza vaccine, increasing the potential for greater vaccine effectiveness,” according to the company.

The Centers for Disease Control and Prevention currently recommends annual influenza vaccination for all individuals aged 6 months and older without contraindications.

Flucelvax is manufactured using a cell-based process that yields a more precise match to the WHO-selected influenza strains for a given year. This process avoids the variation associated with traditional egg-based vaccines, and offers the potential for greater vaccine effectiveness, according to the company.

The approval was based in part on data from a phase 3 randomized, controlled noninferiority study of children aged 6-47 months. The data are the first for a cell-based flu vaccine in this age group, and were presented at the Pediatric Academic Societies meeting in 2021.

In the immunogenicity study of children aged 6 months through 3 years, described in the package insert, 1,597 children received Flucelvax quadrivalent and 805 received a control quadrivalent vaccine. After 28 days, Flucelvax showed noninferiority to the control quadrivalent against four influenza strains.

The most common side effects with Flucelvax quadrivalent vaccine overall are pain, redness, swelling, or a hardened area at the injection site, headache, low energy, muscle aches, and malaise. Additional side effects reported in children include tenderness or bruising at the injection site, sleepiness, diarrhea, changes in eating habits, and irritability. The vaccine is contraindicated for individuals with allergies to any of its ingredients.

Additional efficacy data on Flucelvax for children and adolescents aged 2-18 years were recently published in The New England Journal of Medicine.

Full prescribing information for Flucelvax is available here.

The FDA approval letter is available here.[email protected]

The Food and Drug Administration has approved the Flucelvax quadrivalent vaccine for use in children aged 6 months and older, according to a statement from manufacturer Seqirus.

“This approval officially allows all eligible Americans to receive a cell-based influenza vaccine, increasing the potential for greater vaccine effectiveness,” according to the company.

The Centers for Disease Control and Prevention currently recommends annual influenza vaccination for all individuals aged 6 months and older without contraindications.

Flucelvax is manufactured using a cell-based process that yields a more precise match to the WHO-selected influenza strains for a given year. This process avoids the variation associated with traditional egg-based vaccines, and offers the potential for greater vaccine effectiveness, according to the company.

The approval was based in part on data from a phase 3 randomized, controlled noninferiority study of children aged 6-47 months. The data are the first for a cell-based flu vaccine in this age group, and were presented at the Pediatric Academic Societies meeting in 2021.

In the immunogenicity study of children aged 6 months through 3 years, described in the package insert, 1,597 children received Flucelvax quadrivalent and 805 received a control quadrivalent vaccine. After 28 days, Flucelvax showed noninferiority to the control quadrivalent against four influenza strains.

The most common side effects with Flucelvax quadrivalent vaccine overall are pain, redness, swelling, or a hardened area at the injection site, headache, low energy, muscle aches, and malaise. Additional side effects reported in children include tenderness or bruising at the injection site, sleepiness, diarrhea, changes in eating habits, and irritability. The vaccine is contraindicated for individuals with allergies to any of its ingredients.

Additional efficacy data on Flucelvax for children and adolescents aged 2-18 years were recently published in The New England Journal of Medicine.

Full prescribing information for Flucelvax is available here.

The FDA approval letter is available here.[email protected]

A simple wristband containing biometric monitoring sensors is able to pick up early infection from both influenza and the common cold before symptoms develop. Moreover, it can predict the severity of the illness once it becomes symptomatic, new research shows.

“Prior to the development of symptoms, people are still infectious and can potentially infect others,” senior author Jessilyn Dunn, PhD, Duke University, Durham, N.C., told this news organization.

“That’s why it’s so important to be able to detect infection even when a person doesn’t feel symptomatic, as this would help prevent the spread of pathogens that occur before somebody knows they are sick – and which is why it is important from a public health perspective,” she added.

The study was published online Sept. 29, 2021, in JAMA Network Open.
 

Two challenge studies

The study involved 31 participants who were inoculated with the H1N1 influenza virus and 18 others who were inoculated with rhinovirus. The rhinovirus challenge study was conducted in 2015, and the H1N1 challenge study was carried out in 2018. Both groups of patients were inoculated via intranasal drops of either the diluted H1N1 virus or the diluted rhinovirus strain type 16.

Participants in both challenge studies wore the E4 wristband (Empatica). Those in the influenza study wore the wristband 1 day before and 11 days after being inoculated, and those in the rhinovirus study wore the wristband for 4 days before and 5 days after inoculation. The E4 wristband measures heart rate, skin temperature, electrodermal activity, and movement.

Symptoms were typical of each infection and were classified as both observable events, such as runny nose, cough, and wheezy chest, or unobservable events, such as muscle soreness and fatigue. Infection status was classified as asymptomatic or noninfectious (AON), mild, or moderate.

The biosensors contained within the wristband were able to detect the presence or absence of H1N1 infection with an accuracy of 79% within 12 hours after participants had been inoculated and an accuracy of 92% within 24 hours of being inoculated, the authors report. Thus, “we could assess whether or not a participant was infected with H1N1 between 24 and 36 hours before symptom onset,” the investigators noted.

The median time for symptom onset following the rhinovirus challenge was 36 hours after inoculation. The biosensors predicted the presence or absence of rhinovirus infection with an accuracy of 88%, the authors wrote. And when both viral challenges were combined, models predicting infection had an accuracy of 76% at 24 hours after participants being inoculated.
 

Prediction of severity

Twelve hours after participants had been inoculated, the technology was also able to predict the development of either AON or moderate H1N1 infection with 83% accuracy. For rhinovirus, the predictive accuracy of distinguishing AON versus moderate infection was slightly higher at 92% whereas for both viruses combined, the technology predicted the future development of AON versus moderate infection with an 84% accuracy rate.

As the authors pointed out, the ability to identify individuals during the early critical stage of viral infection could have wide-ranging effects. “In the midst of the global SARS-CoV-2 pandemic, the need for novel approaches like this has never been more apparent,” they suggested.

And in point of fact, in a not-yet peer-reviewed study using a real-time smartwatch-based alerting system again designed to detect aberrant physiologic and activity signals associated with early infection, Stanford (Calif.) University investigators found that alerts were generated for presymptomatic and asymptomatic COVID-19 infections in 78% of cases in over 3200 participants tested at a median of 3 days prior to symptom onset.

The authors also noted that their system is scalable to millions of users, thus offering a personal health monitoring system that can operate in real time.

In a comment, Steven Steinhubl, MD, a research scientist and formerly the director of digital medicine at Scripps Research’s Translational Institute, La Jolla, Calif., told this news organization that he personally has a lot of faith in this type of technology.

“Unfortunately, COVID-19 has changed our perspective about respiratory infections but if you think of the bad flu seasons we’ve had in the past, people do die from influenza, so I think there is a lot of value [in this technology], although the degree of value depends on the severity of the infection,” he said.

For example, if people actually ever go back into work together, early recognition that an employee might have influenza or another highly contagious infection could alert them to the necessity to stay home and self-isolate.

“We have a bit to go before we get there,” Dr. Steinhubl acknowledged, “but you could have a really big impact on the spread of any infectious disease that would be better for everybody.”

Dr. Dunn has disclosed no relevant financial relationships. Dr. Steinhubl is chief medical officer at physIQ, a company involved in the development of personalized analytics.

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

A simple wristband containing biometric monitoring sensors is able to pick up early infection from both influenza and the common cold before symptoms develop. Moreover, it can predict the severity of the illness once it becomes symptomatic, new research shows.

“Prior to the development of symptoms, people are still infectious and can potentially infect others,” senior author Jessilyn Dunn, PhD, Duke University, Durham, N.C., told this news organization.

“That’s why it’s so important to be able to detect infection even when a person doesn’t feel symptomatic, as this would help prevent the spread of pathogens that occur before somebody knows they are sick – and which is why it is important from a public health perspective,” she added.

The study was published online Sept. 29, 2021, in JAMA Network Open.
 

Two challenge studies

The study involved 31 participants who were inoculated with the H1N1 influenza virus and 18 others who were inoculated with rhinovirus. The rhinovirus challenge study was conducted in 2015, and the H1N1 challenge study was carried out in 2018. Both groups of patients were inoculated via intranasal drops of either the diluted H1N1 virus or the diluted rhinovirus strain type 16.

Participants in both challenge studies wore the E4 wristband (Empatica). Those in the influenza study wore the wristband 1 day before and 11 days after being inoculated, and those in the rhinovirus study wore the wristband for 4 days before and 5 days after inoculation. The E4 wristband measures heart rate, skin temperature, electrodermal activity, and movement.

Symptoms were typical of each infection and were classified as both observable events, such as runny nose, cough, and wheezy chest, or unobservable events, such as muscle soreness and fatigue. Infection status was classified as asymptomatic or noninfectious (AON), mild, or moderate.

The biosensors contained within the wristband were able to detect the presence or absence of H1N1 infection with an accuracy of 79% within 12 hours after participants had been inoculated and an accuracy of 92% within 24 hours of being inoculated, the authors report. Thus, “we could assess whether or not a participant was infected with H1N1 between 24 and 36 hours before symptom onset,” the investigators noted.

The median time for symptom onset following the rhinovirus challenge was 36 hours after inoculation. The biosensors predicted the presence or absence of rhinovirus infection with an accuracy of 88%, the authors wrote. And when both viral challenges were combined, models predicting infection had an accuracy of 76% at 24 hours after participants being inoculated.
 

Prediction of severity

Twelve hours after participants had been inoculated, the technology was also able to predict the development of either AON or moderate H1N1 infection with 83% accuracy. For rhinovirus, the predictive accuracy of distinguishing AON versus moderate infection was slightly higher at 92% whereas for both viruses combined, the technology predicted the future development of AON versus moderate infection with an 84% accuracy rate.

As the authors pointed out, the ability to identify individuals during the early critical stage of viral infection could have wide-ranging effects. “In the midst of the global SARS-CoV-2 pandemic, the need for novel approaches like this has never been more apparent,” they suggested.

And in point of fact, in a not-yet peer-reviewed study using a real-time smartwatch-based alerting system again designed to detect aberrant physiologic and activity signals associated with early infection, Stanford (Calif.) University investigators found that alerts were generated for presymptomatic and asymptomatic COVID-19 infections in 78% of cases in over 3200 participants tested at a median of 3 days prior to symptom onset.

The authors also noted that their system is scalable to millions of users, thus offering a personal health monitoring system that can operate in real time.

In a comment, Steven Steinhubl, MD, a research scientist and formerly the director of digital medicine at Scripps Research’s Translational Institute, La Jolla, Calif., told this news organization that he personally has a lot of faith in this type of technology.

“Unfortunately, COVID-19 has changed our perspective about respiratory infections but if you think of the bad flu seasons we’ve had in the past, people do die from influenza, so I think there is a lot of value [in this technology], although the degree of value depends on the severity of the infection,” he said.

For example, if people actually ever go back into work together, early recognition that an employee might have influenza or another highly contagious infection could alert them to the necessity to stay home and self-isolate.

“We have a bit to go before we get there,” Dr. Steinhubl acknowledged, “but you could have a really big impact on the spread of any infectious disease that would be better for everybody.”

Dr. Dunn has disclosed no relevant financial relationships. Dr. Steinhubl is chief medical officer at physIQ, a company involved in the development of personalized analytics.

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

A simple wristband containing biometric monitoring sensors is able to pick up early infection from both influenza and the common cold before symptoms develop. Moreover, it can predict the severity of the illness once it becomes symptomatic, new research shows.

“Prior to the development of symptoms, people are still infectious and can potentially infect others,” senior author Jessilyn Dunn, PhD, Duke University, Durham, N.C., told this news organization.

“That’s why it’s so important to be able to detect infection even when a person doesn’t feel symptomatic, as this would help prevent the spread of pathogens that occur before somebody knows they are sick – and which is why it is important from a public health perspective,” she added.

The study was published online Sept. 29, 2021, in JAMA Network Open.
 

Two challenge studies

The study involved 31 participants who were inoculated with the H1N1 influenza virus and 18 others who were inoculated with rhinovirus. The rhinovirus challenge study was conducted in 2015, and the H1N1 challenge study was carried out in 2018. Both groups of patients were inoculated via intranasal drops of either the diluted H1N1 virus or the diluted rhinovirus strain type 16.

Participants in both challenge studies wore the E4 wristband (Empatica). Those in the influenza study wore the wristband 1 day before and 11 days after being inoculated, and those in the rhinovirus study wore the wristband for 4 days before and 5 days after inoculation. The E4 wristband measures heart rate, skin temperature, electrodermal activity, and movement.

Symptoms were typical of each infection and were classified as both observable events, such as runny nose, cough, and wheezy chest, or unobservable events, such as muscle soreness and fatigue. Infection status was classified as asymptomatic or noninfectious (AON), mild, or moderate.

The biosensors contained within the wristband were able to detect the presence or absence of H1N1 infection with an accuracy of 79% within 12 hours after participants had been inoculated and an accuracy of 92% within 24 hours of being inoculated, the authors report. Thus, “we could assess whether or not a participant was infected with H1N1 between 24 and 36 hours before symptom onset,” the investigators noted.

The median time for symptom onset following the rhinovirus challenge was 36 hours after inoculation. The biosensors predicted the presence or absence of rhinovirus infection with an accuracy of 88%, the authors wrote. And when both viral challenges were combined, models predicting infection had an accuracy of 76% at 24 hours after participants being inoculated.
 

Prediction of severity

Twelve hours after participants had been inoculated, the technology was also able to predict the development of either AON or moderate H1N1 infection with 83% accuracy. For rhinovirus, the predictive accuracy of distinguishing AON versus moderate infection was slightly higher at 92% whereas for both viruses combined, the technology predicted the future development of AON versus moderate infection with an 84% accuracy rate.

As the authors pointed out, the ability to identify individuals during the early critical stage of viral infection could have wide-ranging effects. “In the midst of the global SARS-CoV-2 pandemic, the need for novel approaches like this has never been more apparent,” they suggested.

And in point of fact, in a not-yet peer-reviewed study using a real-time smartwatch-based alerting system again designed to detect aberrant physiologic and activity signals associated with early infection, Stanford (Calif.) University investigators found that alerts were generated for presymptomatic and asymptomatic COVID-19 infections in 78% of cases in over 3200 participants tested at a median of 3 days prior to symptom onset.

The authors also noted that their system is scalable to millions of users, thus offering a personal health monitoring system that can operate in real time.

In a comment, Steven Steinhubl, MD, a research scientist and formerly the director of digital medicine at Scripps Research’s Translational Institute, La Jolla, Calif., told this news organization that he personally has a lot of faith in this type of technology.

“Unfortunately, COVID-19 has changed our perspective about respiratory infections but if you think of the bad flu seasons we’ve had in the past, people do die from influenza, so I think there is a lot of value [in this technology], although the degree of value depends on the severity of the infection,” he said.

For example, if people actually ever go back into work together, early recognition that an employee might have influenza or another highly contagious infection could alert them to the necessity to stay home and self-isolate.

“We have a bit to go before we get there,” Dr. Steinhubl acknowledged, “but you could have a really big impact on the spread of any infectious disease that would be better for everybody.”

Dr. Dunn has disclosed no relevant financial relationships. Dr. Steinhubl is chief medical officer at physIQ, a company involved in the development of personalized analytics.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

With first-time COVID-19 immunizations continuing and the plan to offer booster vaccines to most Americans starting next month, what are the considerations for getting COVID-19 and flu shots at the same time?

This news organization asked Andrew T. Pavia, MD, for his advice. He is the George and Esther Gross Presidential Professor and chief of the division of pediatric infectious diseases at the University of Utah, Salt Lake City, and a fellow of the Infectious Diseases Society of America.
 

Q: With COVID-19 cases surging, is it a good idea to get the flu shot early this season?

Dr. Pavia: I don’t think there is a rush to do it in August, but it is a good idea to get a flu shot this season. The consequences of getting the flu while COVID is circulating are serious.

Q: What are the implications?

There are some we know and some we don’t know. If you develop flu-like symptoms, you’re going to have to get tested. You’re going to have to stay home quite a bit longer if you get a definitive (positive COVID-19) test than you would simply with flu symptoms. Also, you’re probably going to miss work when your workplace is very stressed or your children are stressed by having COVID circulating in schools.

The part we know less about are the implications of getting the flu and COVID together. There is some reason to believe if you get them together, the illness will be more severe. We are seeing that with RSV (respiratory syncytial virus) and parainfluenza and COVID coinfections in children. They appear to be quite severe.

But for flu, we just don’t have the data yet. That’s because there really was no cocirculation of COVID and influenza with the exception of parts of China for a brief part of February and March.
 

Q: Will the planned administration of booster COVID-19 shots this fall affect the number of people who get the flu vaccine or how it’s distributed?

It creates a lot of logistical challenges, particularly for hospitals and other places that need to vaccinate a large number of their employees for flu and that will need to give COVID boosters at about the same time period. It also creates logistical challenges for doctors’ offices.

But we don’t know of any reason why you can’t give the two shots together.
 

Q: Is it possible flu season will be more severe because we isolated and wore masks, etc., last winter? Any science behind that?

The more you study flu, the less you can predict, and I’ve been studying flu for a long time. There are reasons that might suggest a severe flu season – there has been limited immunity, and some people are not wearing masks effectively and they are gathering again. Those are things we believe protected us from influenza last season.

But we have not seen flu emerge yet. Normally we look to Australia, New Zealand, and South Africa during their winter – which is our summer – to get some idea of what is over the horizon for the Northern Hemisphere. Flu activity in Australia has been very modest this year.

That might mean flu may not show up for a while, but I would be loathe to make a prediction.
 

Q: What are the chances we’ll see a flu outbreak like we’re seeing with RSV, which is normally a winter illness?

The fact that we had a summer RSV surge just gives you an idea of how the normal epidemiology of viral infections has been disrupted. It means anything could happen with influenza. It could show up late summer or fall or wait until next spring.

We really don’t understand how those interactions work. When a new flu strain emerges, it often ignores the traditional behavior and shows up in the spring or fall. It happened in the 2009 pandemic, it happened in 1918.

The one thing I would safely predict about the next flu wave is that it will surprise us.
 

Q: Are you hopeful that combination vaccines in development from a number of companies, such as Moderna, Novavax, and Vivaldi, will be effective?

It is beginning to look like COVID will be with us for the foreseeable future – maybe as a seasonal virus or maybe as an ongoing pandemic. We are going to need to protect (ourselves) simultaneously against the flu and COVID. A single shot is a great way to do that – nobody wants two needles; nobody wants two trips to get vaccinated.

An effective combination vaccine would be a really great tool.

We have to wait to see what the science shows us, because they are quite different viruses. We won’t know if a combination vaccine works well and has acceptable side effects until we do those studies.
 

Q. Do you know at this point whether the side effects from two vaccines would be additive? Is there any way to predict that?

There is no way to predict. There are so many things that go into whether someone has side effects that we don’t understand. With fairly reactogenic vaccines like the mRNA vaccines, lots of people have no side effects whatsoever and others are really uncomfortable for 24 hours.

Flu is generally a better tolerated vaccine. There are still people who get muscle aches and very sore arms. I don’t think we can predict if getting two will be additive or just the same as getting one vaccine.
 

Q: Other than convenience and the benefit for people who are needle-phobic, are there any other advantages of combining them into one shot?

The logistics alone are enough to justify having one effective product if we can make one. It should reduce the overall cost of administration and reduce time off from work.

The combination vaccines given by pediatricians have been very successful. They reduce the number of needles for kids and make it much easier for parents and the pediatricians administering them. The same principle should apply to adults, who sometimes are less brave about needles than kids are.

Historically, combined vaccines in general have worked as well as vaccines given alone, but there have been exceptions. We just have to see what the products look like.
 

Q: For now, the flu vaccine and COVID-19 vaccine are single products. If you get them separately, is it better to put some time between the two?

We don’t know. There are studies that probably won’t be out in time to decide in September. They are looking at whether you get an equivalent immune response if you give them together or apart.

For now, I would say the advantage of getting them together is if you do get side effects, you’ll only get them once – one day to suffer through them. Also, it’s one trip to the doctor.

The potential advantage of separating them is that is how we developed and tested the vaccines. If you do react to them, side effects could be milder, but it will be on two separate days.

I would recommend doing whatever works so that you get both vaccines in a timely manner.

I’m going to get my flu shot as soon as it’s available. If I’m due for a COVID booster at that time, I would probably do them together.
 

Q: Do you foresee a point in the future when the predominant strain of SARS-CoV-2 will be one of the components of a flu vaccine, like we did in the past with H1N1, etc?

It really remains to be seen, but it is very conceivable it could happen. The same companies that developed COVID-19 vaccines are working on flu vaccines.

Q: Any other advice for people concerned about getting immunized against both COVID-19 and influenza in the coming months?

There is no side effect of the vaccine that begins to approach the risk you face from either disease. It’s really one of the best things you can do to protect yourself is to get vaccinated.

In the case of flu, the vaccine is only modestly effective, but it still saves tens of thousands of lives each year. The SARS-CoV-2 vaccine is a much better vaccine and a deadlier disease.

Dr. Pavia consulted for GlaxoSmithKline on influenza testing.

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

With first-time COVID-19 immunizations continuing and the plan to offer booster vaccines to most Americans starting next month, what are the considerations for getting COVID-19 and flu shots at the same time?

This news organization asked Andrew T. Pavia, MD, for his advice. He is the George and Esther Gross Presidential Professor and chief of the division of pediatric infectious diseases at the University of Utah, Salt Lake City, and a fellow of the Infectious Diseases Society of America.
 

Q: With COVID-19 cases surging, is it a good idea to get the flu shot early this season?

Dr. Pavia: I don’t think there is a rush to do it in August, but it is a good idea to get a flu shot this season. The consequences of getting the flu while COVID is circulating are serious.

Q: What are the implications?

There are some we know and some we don’t know. If you develop flu-like symptoms, you’re going to have to get tested. You’re going to have to stay home quite a bit longer if you get a definitive (positive COVID-19) test than you would simply with flu symptoms. Also, you’re probably going to miss work when your workplace is very stressed or your children are stressed by having COVID circulating in schools.

The part we know less about are the implications of getting the flu and COVID together. There is some reason to believe if you get them together, the illness will be more severe. We are seeing that with RSV (respiratory syncytial virus) and parainfluenza and COVID coinfections in children. They appear to be quite severe.

But for flu, we just don’t have the data yet. That’s because there really was no cocirculation of COVID and influenza with the exception of parts of China for a brief part of February and March.
 

Q: Will the planned administration of booster COVID-19 shots this fall affect the number of people who get the flu vaccine or how it’s distributed?

It creates a lot of logistical challenges, particularly for hospitals and other places that need to vaccinate a large number of their employees for flu and that will need to give COVID boosters at about the same time period. It also creates logistical challenges for doctors’ offices.

But we don’t know of any reason why you can’t give the two shots together.
 

Q: Is it possible flu season will be more severe because we isolated and wore masks, etc., last winter? Any science behind that?

The more you study flu, the less you can predict, and I’ve been studying flu for a long time. There are reasons that might suggest a severe flu season – there has been limited immunity, and some people are not wearing masks effectively and they are gathering again. Those are things we believe protected us from influenza last season.

But we have not seen flu emerge yet. Normally we look to Australia, New Zealand, and South Africa during their winter – which is our summer – to get some idea of what is over the horizon for the Northern Hemisphere. Flu activity in Australia has been very modest this year.

That might mean flu may not show up for a while, but I would be loathe to make a prediction.
 

Q: What are the chances we’ll see a flu outbreak like we’re seeing with RSV, which is normally a winter illness?

The fact that we had a summer RSV surge just gives you an idea of how the normal epidemiology of viral infections has been disrupted. It means anything could happen with influenza. It could show up late summer or fall or wait until next spring.

We really don’t understand how those interactions work. When a new flu strain emerges, it often ignores the traditional behavior and shows up in the spring or fall. It happened in the 2009 pandemic, it happened in 1918.

The one thing I would safely predict about the next flu wave is that it will surprise us.
 

Q: Are you hopeful that combination vaccines in development from a number of companies, such as Moderna, Novavax, and Vivaldi, will be effective?

It is beginning to look like COVID will be with us for the foreseeable future – maybe as a seasonal virus or maybe as an ongoing pandemic. We are going to need to protect (ourselves) simultaneously against the flu and COVID. A single shot is a great way to do that – nobody wants two needles; nobody wants two trips to get vaccinated.

An effective combination vaccine would be a really great tool.

We have to wait to see what the science shows us, because they are quite different viruses. We won’t know if a combination vaccine works well and has acceptable side effects until we do those studies.
 

Q. Do you know at this point whether the side effects from two vaccines would be additive? Is there any way to predict that?

There is no way to predict. There are so many things that go into whether someone has side effects that we don’t understand. With fairly reactogenic vaccines like the mRNA vaccines, lots of people have no side effects whatsoever and others are really uncomfortable for 24 hours.

Flu is generally a better tolerated vaccine. There are still people who get muscle aches and very sore arms. I don’t think we can predict if getting two will be additive or just the same as getting one vaccine.
 

Q: Other than convenience and the benefit for people who are needle-phobic, are there any other advantages of combining them into one shot?

The logistics alone are enough to justify having one effective product if we can make one. It should reduce the overall cost of administration and reduce time off from work.

The combination vaccines given by pediatricians have been very successful. They reduce the number of needles for kids and make it much easier for parents and the pediatricians administering them. The same principle should apply to adults, who sometimes are less brave about needles than kids are.

Historically, combined vaccines in general have worked as well as vaccines given alone, but there have been exceptions. We just have to see what the products look like.
 

Q: For now, the flu vaccine and COVID-19 vaccine are single products. If you get them separately, is it better to put some time between the two?

We don’t know. There are studies that probably won’t be out in time to decide in September. They are looking at whether you get an equivalent immune response if you give them together or apart.

For now, I would say the advantage of getting them together is if you do get side effects, you’ll only get them once – one day to suffer through them. Also, it’s one trip to the doctor.

The potential advantage of separating them is that is how we developed and tested the vaccines. If you do react to them, side effects could be milder, but it will be on two separate days.

I would recommend doing whatever works so that you get both vaccines in a timely manner.

I’m going to get my flu shot as soon as it’s available. If I’m due for a COVID booster at that time, I would probably do them together.
 

Q: Do you foresee a point in the future when the predominant strain of SARS-CoV-2 will be one of the components of a flu vaccine, like we did in the past with H1N1, etc?

It really remains to be seen, but it is very conceivable it could happen. The same companies that developed COVID-19 vaccines are working on flu vaccines.

Q: Any other advice for people concerned about getting immunized against both COVID-19 and influenza in the coming months?

There is no side effect of the vaccine that begins to approach the risk you face from either disease. It’s really one of the best things you can do to protect yourself is to get vaccinated.

In the case of flu, the vaccine is only modestly effective, but it still saves tens of thousands of lives each year. The SARS-CoV-2 vaccine is a much better vaccine and a deadlier disease.

Dr. Pavia consulted for GlaxoSmithKline on influenza testing.

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

With first-time COVID-19 immunizations continuing and the plan to offer booster vaccines to most Americans starting next month, what are the considerations for getting COVID-19 and flu shots at the same time?

This news organization asked Andrew T. Pavia, MD, for his advice. He is the George and Esther Gross Presidential Professor and chief of the division of pediatric infectious diseases at the University of Utah, Salt Lake City, and a fellow of the Infectious Diseases Society of America.
 

Q: With COVID-19 cases surging, is it a good idea to get the flu shot early this season?

Dr. Pavia: I don’t think there is a rush to do it in August, but it is a good idea to get a flu shot this season. The consequences of getting the flu while COVID is circulating are serious.

Q: What are the implications?

There are some we know and some we don’t know. If you develop flu-like symptoms, you’re going to have to get tested. You’re going to have to stay home quite a bit longer if you get a definitive (positive COVID-19) test than you would simply with flu symptoms. Also, you’re probably going to miss work when your workplace is very stressed or your children are stressed by having COVID circulating in schools.

The part we know less about are the implications of getting the flu and COVID together. There is some reason to believe if you get them together, the illness will be more severe. We are seeing that with RSV (respiratory syncytial virus) and parainfluenza and COVID coinfections in children. They appear to be quite severe.

But for flu, we just don’t have the data yet. That’s because there really was no cocirculation of COVID and influenza with the exception of parts of China for a brief part of February and March.
 

Q: Will the planned administration of booster COVID-19 shots this fall affect the number of people who get the flu vaccine or how it’s distributed?

It creates a lot of logistical challenges, particularly for hospitals and other places that need to vaccinate a large number of their employees for flu and that will need to give COVID boosters at about the same time period. It also creates logistical challenges for doctors’ offices.

But we don’t know of any reason why you can’t give the two shots together.
 

Q: Is it possible flu season will be more severe because we isolated and wore masks, etc., last winter? Any science behind that?

The more you study flu, the less you can predict, and I’ve been studying flu for a long time. There are reasons that might suggest a severe flu season – there has been limited immunity, and some people are not wearing masks effectively and they are gathering again. Those are things we believe protected us from influenza last season.

But we have not seen flu emerge yet. Normally we look to Australia, New Zealand, and South Africa during their winter – which is our summer – to get some idea of what is over the horizon for the Northern Hemisphere. Flu activity in Australia has been very modest this year.

That might mean flu may not show up for a while, but I would be loathe to make a prediction.
 

Q: What are the chances we’ll see a flu outbreak like we’re seeing with RSV, which is normally a winter illness?

The fact that we had a summer RSV surge just gives you an idea of how the normal epidemiology of viral infections has been disrupted. It means anything could happen with influenza. It could show up late summer or fall or wait until next spring.

We really don’t understand how those interactions work. When a new flu strain emerges, it often ignores the traditional behavior and shows up in the spring or fall. It happened in the 2009 pandemic, it happened in 1918.

The one thing I would safely predict about the next flu wave is that it will surprise us.
 

Q: Are you hopeful that combination vaccines in development from a number of companies, such as Moderna, Novavax, and Vivaldi, will be effective?

It is beginning to look like COVID will be with us for the foreseeable future – maybe as a seasonal virus or maybe as an ongoing pandemic. We are going to need to protect (ourselves) simultaneously against the flu and COVID. A single shot is a great way to do that – nobody wants two needles; nobody wants two trips to get vaccinated.

An effective combination vaccine would be a really great tool.

We have to wait to see what the science shows us, because they are quite different viruses. We won’t know if a combination vaccine works well and has acceptable side effects until we do those studies.
 

Q. Do you know at this point whether the side effects from two vaccines would be additive? Is there any way to predict that?

There is no way to predict. There are so many things that go into whether someone has side effects that we don’t understand. With fairly reactogenic vaccines like the mRNA vaccines, lots of people have no side effects whatsoever and others are really uncomfortable for 24 hours.

Flu is generally a better tolerated vaccine. There are still people who get muscle aches and very sore arms. I don’t think we can predict if getting two will be additive or just the same as getting one vaccine.
 

Q: Other than convenience and the benefit for people who are needle-phobic, are there any other advantages of combining them into one shot?

The logistics alone are enough to justify having one effective product if we can make one. It should reduce the overall cost of administration and reduce time off from work.

The combination vaccines given by pediatricians have been very successful. They reduce the number of needles for kids and make it much easier for parents and the pediatricians administering them. The same principle should apply to adults, who sometimes are less brave about needles than kids are.

Historically, combined vaccines in general have worked as well as vaccines given alone, but there have been exceptions. We just have to see what the products look like.
 

Q: For now, the flu vaccine and COVID-19 vaccine are single products. If you get them separately, is it better to put some time between the two?

We don’t know. There are studies that probably won’t be out in time to decide in September. They are looking at whether you get an equivalent immune response if you give them together or apart.

For now, I would say the advantage of getting them together is if you do get side effects, you’ll only get them once – one day to suffer through them. Also, it’s one trip to the doctor.

The potential advantage of separating them is that is how we developed and tested the vaccines. If you do react to them, side effects could be milder, but it will be on two separate days.

I would recommend doing whatever works so that you get both vaccines in a timely manner.

I’m going to get my flu shot as soon as it’s available. If I’m due for a COVID booster at that time, I would probably do them together.
 

Q: Do you foresee a point in the future when the predominant strain of SARS-CoV-2 will be one of the components of a flu vaccine, like we did in the past with H1N1, etc?

It really remains to be seen, but it is very conceivable it could happen. The same companies that developed COVID-19 vaccines are working on flu vaccines.

Q: Any other advice for people concerned about getting immunized against both COVID-19 and influenza in the coming months?

There is no side effect of the vaccine that begins to approach the risk you face from either disease. It’s really one of the best things you can do to protect yourself is to get vaccinated.

In the case of flu, the vaccine is only modestly effective, but it still saves tens of thousands of lives each year. The SARS-CoV-2 vaccine is a much better vaccine and a deadlier disease.

Dr. Pavia consulted for GlaxoSmithKline on influenza testing.

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

Nonpharmaceutical interventions, such as masking, staying home, limiting travel, and social distancing, have been doing more than reducing the risk for COVID-19. They’re also having an impact on infection rates and the timing of seasonal surges of other common respiratory diseases, according to an article published July 23 in Morbidity and Mortality Weekly Report.

Typically, respiratory pathogens such as respiratory syncytial virus (RSV), common cold coronaviruses, parainfluenza viruses, and respiratory adenoviruses increase in the fall and remain high throughout winter, following the same basic patterns as influenza. Although the historically low rates of influenza remained low into spring 2021, that’s not the case for several other common respiratory viruses.

“Clinicians should be aware of increases in some respiratory virus activity and remain vigilant for off-season increases,” wrote Sonja J. Olsen, PhD, and her colleagues at the Centers for Disease Control and Prevention. She told this news organization that clinicians should use multipathogen testing to help guide treatment.

The authors also underscore the importance of fall influenza vaccination campaigns for anyone aged 6 months or older.

Timothy Brewer, MD, MPH, a professor of medicine in the Division of Infectious Diseases at the University of California, Los Angeles (UCLA), and of epidemiology at the UCLA Fielding School of Public Health, agreed that it’s important for health care professionals to consider off-season illnesses in their patients.

“Practitioners should be aware that if they see a sick child in the summer, outside of what normally might be influenza season, but they look like they have influenza, consider potentially influenza and test for it, because it might be possible that we may have disrupted that natural pattern,” Dr. Brewer told this news organization. Dr. Brewer, who was not involved in the CDC research, said it’s also “critically important” to encourage influenza vaccination as the season approaches.

The CDC researchers used the U.S. World Health Organization Collaborating Laboratories System and the CDC’s National Respiratory and Enteric Virus Surveillance System to analyze virologic data from Oct. 3, 2020, to May 22, 2021, for influenza and Jan. 4, 2020, to May 22, 2021, for other respiratory viruses. The authors compared virus circulation during these periods to circulation during the same dates from four previous years.

Data to calculate influenza and RSV hospitalization rates came from the Influenza Hospitalization Surveillance Network and RSV Hospitalization Surveillance Network.

The authors report that flu activity dropped dramatically in March 2020 to its lowest levels since 1997, the earliest season for which data are available. Only 0.2% of more than 1 million specimens tested positive for influenza; the rate of hospitalizations for lab-confirmed flu was 0.8 per 100,000 people. Flu levels remained low through the summer, fall, and on to May 2021.

A potential drawback to this low activity, however, is a more prevalent and severe upcoming flu season, the authors write. The repeated exposure to flu viruses every year often “does not lead to illness, but it does serve to boost our immune response to influenza viruses,” Dr. Olsen said in an interview. “The absence of influenza viruses in the community over the last year means that we are not getting these regular boosts to our immune system. When we finally get exposed, our body may mount a weak response, and this could mean we develop a more clinically severe illness.”

Children are most susceptible to that phenomenon because they haven’t had a lifetime of exposure to flu viruses, Dr. Olsen said.

“An immunologically naive child may be more likely to develop a severe illness than someone who has lived through several influenza seasons,” she said. “This is why it is especially important for everyone 6 months and older to get vaccinated against influenza this season.”

Rhinovirus and enterovirus infections rebounded fairly quickly after their decline in March 2020 and started increasing in May 2020 until they reached “near prepandemic seasonal levels,” the authors write.

RSV infections dropped from 15.3% of weekly positive results in January 2020 to 1.4% by April and then stayed below 1% through the end of 2020. In past years, weekly positive results climbed to 3% in October and peaked at 12.5% to 16.7% in late December. Instead, RSV weekly positive results began increasing in April 2021, rising from 1.1% to 2.8% in May.

The “unusually timed” late spring increase in RSV “is probably associated with various nonpharmaceutical measures that have been in place but are now relaxing,” Dr. Olsen stated.

The RSV hospitalization rate was 0.3 per 100,000 people from October 2020 to April 2021, compared to 27.1 and 33.4 per 100,000 people in the previous 2 years. Of all RSV hospitalizations in the past year, 76.5% occurred in April-May 2021.

Rates of illness caused by the four common human coronaviruses (OC43, NL63, 229E, and HKU1) dropped from 7.5% of weekly positive results in January 2020 to 1.3% in April 2020 and stayed below 1% through February 2021. Then they climbed to 6.6% by May 2021. Infection rates of parainfluenza viruses types 1-4 similarly dropped from 2.6% in January 2020 to 1% in March 2020 and stayed below 1% until April 2021. Since then, rates of the common coronaviruses increased to 6.6% and parainfluenza viruses to 10.9% in May 2021.

Normally, parainfluenza viruses peak in October-November and May-June, so “the current increase could represent a return to prepandemic seasonality,” the authors write.

Human pneumoviruses’ weekly positive results initially increased from 4.2% in January 2020 to 7% in March and then fell to 1.9% the second week of April and remained below 1% through May 2021. In typical years, these viruses peak from 6.2% to 7.7% in March-April. Respiratory adenovirus activity similarly dropped to historically low levels in April 2021 and then began increasing to reach 3% by May 2021, the usual level for that month.

“The different circulation patterns observed across respiratory viruses probably also reflect differences in the virus transmission routes and how effective various nonpharmaceutical measures are at stopping transmission,” Dr. Olsen said in an interview. “As pandemic mitigation measures continue to be adjusted, we expect to see more changes in the circulation of these viruses, including a return to prepandemic circulation, as seen for rhinoviruses and enteroviruses.”

Rhinovirus and enterovirus rates dropped from 14.9% in March 2020 to 3.2% in May – lower than typical – and then climbed to a peak in October 2020. The peak (21.7% weekly positive results) was, however, still lower than the usual median of 32.8%. After dropping to 9.9% in January 2021, it then rose 19.1% in May, potentially reflecting “the usual spring peak that has occurred in previous years,” the authors write.

The authors note that it’s not yet clear how the COVID-19 pandemic and related mitigation measures will continue to affect respiratory virus circulation.

The authors hypothesize that the reasons for a seeming return to seasonal activity of respiratory adenoviruses, rhinoviruses, and enteroviruses could involve “different transmission mechanisms, the role of asymptomatic transmission, and prolonged survival of these nonenveloped viruses on surfaces, all of which might make these viruses less susceptible to nonpharmaceutical interventions.”

Dr. Brewer, of UCLA, agreed.

All the viruses basically “flatline except for adenoviruses and enteroviruses, and they behave a little differently in terms of how they spread,” he said. “Enteroviruses are much more likely to be fecal-oral spread than the other viruses [in the study].”

The delayed circulation of parainfluenza and human coronaviruses may have resulted from suspension of in-person classes through late winter 2020, they write, but that doesn’t explain the relative absence of pneumovirus activity, which usually affects the same young pediatric populations as RSV.

Dr. Brewer said California is seeing a surge of RSV right now, as are many states, especially throughout in the South. He’s not surprised by RSV’s deferred season, because those most affected – children younger than 2 years – are less likely to wear masks now and were “not going to daycare, not being out in public” in 2020. “As people are doing more activities, that’s probably why RSV has been starting to go up since April,” he said.

Despite the fact that, unlike many East Asian cultures, the United States has not traditionally been a mask-wearing culture, Dr. Brewer wouldn’t be surprised if more Americans begin wearing masks during flu season. “Hopefully another thing that will come out of this is better hand hygiene, with people just getting used to washing their hands more, particularly after they come home from being out,” he added.

Dr. Brewer similarly emphasized the importance of flu vaccination for the upcoming season, especially for younger children who may have poorer natural immunity to influenza, owing to its low circulation rates in 2020-2021.

The study was funded by the CDC. Dr. Brewer and Dr. Olsen have disclosed no relevant financial relationships.

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

Nonpharmaceutical interventions, such as masking, staying home, limiting travel, and social distancing, have been doing more than reducing the risk for COVID-19. They’re also having an impact on infection rates and the timing of seasonal surges of other common respiratory diseases, according to an article published July 23 in Morbidity and Mortality Weekly Report.

Typically, respiratory pathogens such as respiratory syncytial virus (RSV), common cold coronaviruses, parainfluenza viruses, and respiratory adenoviruses increase in the fall and remain high throughout winter, following the same basic patterns as influenza. Although the historically low rates of influenza remained low into spring 2021, that’s not the case for several other common respiratory viruses.

“Clinicians should be aware of increases in some respiratory virus activity and remain vigilant for off-season increases,” wrote Sonja J. Olsen, PhD, and her colleagues at the Centers for Disease Control and Prevention. She told this news organization that clinicians should use multipathogen testing to help guide treatment.

The authors also underscore the importance of fall influenza vaccination campaigns for anyone aged 6 months or older.

Timothy Brewer, MD, MPH, a professor of medicine in the Division of Infectious Diseases at the University of California, Los Angeles (UCLA), and of epidemiology at the UCLA Fielding School of Public Health, agreed that it’s important for health care professionals to consider off-season illnesses in their patients.

“Practitioners should be aware that if they see a sick child in the summer, outside of what normally might be influenza season, but they look like they have influenza, consider potentially influenza and test for it, because it might be possible that we may have disrupted that natural pattern,” Dr. Brewer told this news organization. Dr. Brewer, who was not involved in the CDC research, said it’s also “critically important” to encourage influenza vaccination as the season approaches.

The CDC researchers used the U.S. World Health Organization Collaborating Laboratories System and the CDC’s National Respiratory and Enteric Virus Surveillance System to analyze virologic data from Oct. 3, 2020, to May 22, 2021, for influenza and Jan. 4, 2020, to May 22, 2021, for other respiratory viruses. The authors compared virus circulation during these periods to circulation during the same dates from four previous years.

Data to calculate influenza and RSV hospitalization rates came from the Influenza Hospitalization Surveillance Network and RSV Hospitalization Surveillance Network.

The authors report that flu activity dropped dramatically in March 2020 to its lowest levels since 1997, the earliest season for which data are available. Only 0.2% of more than 1 million specimens tested positive for influenza; the rate of hospitalizations for lab-confirmed flu was 0.8 per 100,000 people. Flu levels remained low through the summer, fall, and on to May 2021.

A potential drawback to this low activity, however, is a more prevalent and severe upcoming flu season, the authors write. The repeated exposure to flu viruses every year often “does not lead to illness, but it does serve to boost our immune response to influenza viruses,” Dr. Olsen said in an interview. “The absence of influenza viruses in the community over the last year means that we are not getting these regular boosts to our immune system. When we finally get exposed, our body may mount a weak response, and this could mean we develop a more clinically severe illness.”

Children are most susceptible to that phenomenon because they haven’t had a lifetime of exposure to flu viruses, Dr. Olsen said.

“An immunologically naive child may be more likely to develop a severe illness than someone who has lived through several influenza seasons,” she said. “This is why it is especially important for everyone 6 months and older to get vaccinated against influenza this season.”

Rhinovirus and enterovirus infections rebounded fairly quickly after their decline in March 2020 and started increasing in May 2020 until they reached “near prepandemic seasonal levels,” the authors write.

RSV infections dropped from 15.3% of weekly positive results in January 2020 to 1.4% by April and then stayed below 1% through the end of 2020. In past years, weekly positive results climbed to 3% in October and peaked at 12.5% to 16.7% in late December. Instead, RSV weekly positive results began increasing in April 2021, rising from 1.1% to 2.8% in May.

The “unusually timed” late spring increase in RSV “is probably associated with various nonpharmaceutical measures that have been in place but are now relaxing,” Dr. Olsen stated.

The RSV hospitalization rate was 0.3 per 100,000 people from October 2020 to April 2021, compared to 27.1 and 33.4 per 100,000 people in the previous 2 years. Of all RSV hospitalizations in the past year, 76.5% occurred in April-May 2021.

Rates of illness caused by the four common human coronaviruses (OC43, NL63, 229E, and HKU1) dropped from 7.5% of weekly positive results in January 2020 to 1.3% in April 2020 and stayed below 1% through February 2021. Then they climbed to 6.6% by May 2021. Infection rates of parainfluenza viruses types 1-4 similarly dropped from 2.6% in January 2020 to 1% in March 2020 and stayed below 1% until April 2021. Since then, rates of the common coronaviruses increased to 6.6% and parainfluenza viruses to 10.9% in May 2021.

Normally, parainfluenza viruses peak in October-November and May-June, so “the current increase could represent a return to prepandemic seasonality,” the authors write.

Human pneumoviruses’ weekly positive results initially increased from 4.2% in January 2020 to 7% in March and then fell to 1.9% the second week of April and remained below 1% through May 2021. In typical years, these viruses peak from 6.2% to 7.7% in March-April. Respiratory adenovirus activity similarly dropped to historically low levels in April 2021 and then began increasing to reach 3% by May 2021, the usual level for that month.

“The different circulation patterns observed across respiratory viruses probably also reflect differences in the virus transmission routes and how effective various nonpharmaceutical measures are at stopping transmission,” Dr. Olsen said in an interview. “As pandemic mitigation measures continue to be adjusted, we expect to see more changes in the circulation of these viruses, including a return to prepandemic circulation, as seen for rhinoviruses and enteroviruses.”

Rhinovirus and enterovirus rates dropped from 14.9% in March 2020 to 3.2% in May – lower than typical – and then climbed to a peak in October 2020. The peak (21.7% weekly positive results) was, however, still lower than the usual median of 32.8%. After dropping to 9.9% in January 2021, it then rose 19.1% in May, potentially reflecting “the usual spring peak that has occurred in previous years,” the authors write.

The authors note that it’s not yet clear how the COVID-19 pandemic and related mitigation measures will continue to affect respiratory virus circulation.

The authors hypothesize that the reasons for a seeming return to seasonal activity of respiratory adenoviruses, rhinoviruses, and enteroviruses could involve “different transmission mechanisms, the role of asymptomatic transmission, and prolonged survival of these nonenveloped viruses on surfaces, all of which might make these viruses less susceptible to nonpharmaceutical interventions.”

Dr. Brewer, of UCLA, agreed.

All the viruses basically “flatline except for adenoviruses and enteroviruses, and they behave a little differently in terms of how they spread,” he said. “Enteroviruses are much more likely to be fecal-oral spread than the other viruses [in the study].”

The delayed circulation of parainfluenza and human coronaviruses may have resulted from suspension of in-person classes through late winter 2020, they write, but that doesn’t explain the relative absence of pneumovirus activity, which usually affects the same young pediatric populations as RSV.

Dr. Brewer said California is seeing a surge of RSV right now, as are many states, especially throughout in the South. He’s not surprised by RSV’s deferred season, because those most affected – children younger than 2 years – are less likely to wear masks now and were “not going to daycare, not being out in public” in 2020. “As people are doing more activities, that’s probably why RSV has been starting to go up since April,” he said.

Despite the fact that, unlike many East Asian cultures, the United States has not traditionally been a mask-wearing culture, Dr. Brewer wouldn’t be surprised if more Americans begin wearing masks during flu season. “Hopefully another thing that will come out of this is better hand hygiene, with people just getting used to washing their hands more, particularly after they come home from being out,” he added.

Dr. Brewer similarly emphasized the importance of flu vaccination for the upcoming season, especially for younger children who may have poorer natural immunity to influenza, owing to its low circulation rates in 2020-2021.

The study was funded by the CDC. Dr. Brewer and Dr. Olsen have disclosed no relevant financial relationships.

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

Nonpharmaceutical interventions, such as masking, staying home, limiting travel, and social distancing, have been doing more than reducing the risk for COVID-19. They’re also having an impact on infection rates and the timing of seasonal surges of other common respiratory diseases, according to an article published July 23 in Morbidity and Mortality Weekly Report.

Typically, respiratory pathogens such as respiratory syncytial virus (RSV), common cold coronaviruses, parainfluenza viruses, and respiratory adenoviruses increase in the fall and remain high throughout winter, following the same basic patterns as influenza. Although the historically low rates of influenza remained low into spring 2021, that’s not the case for several other common respiratory viruses.

“Clinicians should be aware of increases in some respiratory virus activity and remain vigilant for off-season increases,” wrote Sonja J. Olsen, PhD, and her colleagues at the Centers for Disease Control and Prevention. She told this news organization that clinicians should use multipathogen testing to help guide treatment.

The authors also underscore the importance of fall influenza vaccination campaigns for anyone aged 6 months or older.

Timothy Brewer, MD, MPH, a professor of medicine in the Division of Infectious Diseases at the University of California, Los Angeles (UCLA), and of epidemiology at the UCLA Fielding School of Public Health, agreed that it’s important for health care professionals to consider off-season illnesses in their patients.

“Practitioners should be aware that if they see a sick child in the summer, outside of what normally might be influenza season, but they look like they have influenza, consider potentially influenza and test for it, because it might be possible that we may have disrupted that natural pattern,” Dr. Brewer told this news organization. Dr. Brewer, who was not involved in the CDC research, said it’s also “critically important” to encourage influenza vaccination as the season approaches.

The CDC researchers used the U.S. World Health Organization Collaborating Laboratories System and the CDC’s National Respiratory and Enteric Virus Surveillance System to analyze virologic data from Oct. 3, 2020, to May 22, 2021, for influenza and Jan. 4, 2020, to May 22, 2021, for other respiratory viruses. The authors compared virus circulation during these periods to circulation during the same dates from four previous years.

Data to calculate influenza and RSV hospitalization rates came from the Influenza Hospitalization Surveillance Network and RSV Hospitalization Surveillance Network.

The authors report that flu activity dropped dramatically in March 2020 to its lowest levels since 1997, the earliest season for which data are available. Only 0.2% of more than 1 million specimens tested positive for influenza; the rate of hospitalizations for lab-confirmed flu was 0.8 per 100,000 people. Flu levels remained low through the summer, fall, and on to May 2021.

A potential drawback to this low activity, however, is a more prevalent and severe upcoming flu season, the authors write. The repeated exposure to flu viruses every year often “does not lead to illness, but it does serve to boost our immune response to influenza viruses,” Dr. Olsen said in an interview. “The absence of influenza viruses in the community over the last year means that we are not getting these regular boosts to our immune system. When we finally get exposed, our body may mount a weak response, and this could mean we develop a more clinically severe illness.”

Children are most susceptible to that phenomenon because they haven’t had a lifetime of exposure to flu viruses, Dr. Olsen said.

“An immunologically naive child may be more likely to develop a severe illness than someone who has lived through several influenza seasons,” she said. “This is why it is especially important for everyone 6 months and older to get vaccinated against influenza this season.”

Rhinovirus and enterovirus infections rebounded fairly quickly after their decline in March 2020 and started increasing in May 2020 until they reached “near prepandemic seasonal levels,” the authors write.

RSV infections dropped from 15.3% of weekly positive results in January 2020 to 1.4% by April and then stayed below 1% through the end of 2020. In past years, weekly positive results climbed to 3% in October and peaked at 12.5% to 16.7% in late December. Instead, RSV weekly positive results began increasing in April 2021, rising from 1.1% to 2.8% in May.

The “unusually timed” late spring increase in RSV “is probably associated with various nonpharmaceutical measures that have been in place but are now relaxing,” Dr. Olsen stated.

The RSV hospitalization rate was 0.3 per 100,000 people from October 2020 to April 2021, compared to 27.1 and 33.4 per 100,000 people in the previous 2 years. Of all RSV hospitalizations in the past year, 76.5% occurred in April-May 2021.

Rates of illness caused by the four common human coronaviruses (OC43, NL63, 229E, and HKU1) dropped from 7.5% of weekly positive results in January 2020 to 1.3% in April 2020 and stayed below 1% through February 2021. Then they climbed to 6.6% by May 2021. Infection rates of parainfluenza viruses types 1-4 similarly dropped from 2.6% in January 2020 to 1% in March 2020 and stayed below 1% until April 2021. Since then, rates of the common coronaviruses increased to 6.6% and parainfluenza viruses to 10.9% in May 2021.

Normally, parainfluenza viruses peak in October-November and May-June, so “the current increase could represent a return to prepandemic seasonality,” the authors write.

Human pneumoviruses’ weekly positive results initially increased from 4.2% in January 2020 to 7% in March and then fell to 1.9% the second week of April and remained below 1% through May 2021. In typical years, these viruses peak from 6.2% to 7.7% in March-April. Respiratory adenovirus activity similarly dropped to historically low levels in April 2021 and then began increasing to reach 3% by May 2021, the usual level for that month.

“The different circulation patterns observed across respiratory viruses probably also reflect differences in the virus transmission routes and how effective various nonpharmaceutical measures are at stopping transmission,” Dr. Olsen said in an interview. “As pandemic mitigation measures continue to be adjusted, we expect to see more changes in the circulation of these viruses, including a return to prepandemic circulation, as seen for rhinoviruses and enteroviruses.”

Rhinovirus and enterovirus rates dropped from 14.9% in March 2020 to 3.2% in May – lower than typical – and then climbed to a peak in October 2020. The peak (21.7% weekly positive results) was, however, still lower than the usual median of 32.8%. After dropping to 9.9% in January 2021, it then rose 19.1% in May, potentially reflecting “the usual spring peak that has occurred in previous years,” the authors write.

The authors note that it’s not yet clear how the COVID-19 pandemic and related mitigation measures will continue to affect respiratory virus circulation.

The authors hypothesize that the reasons for a seeming return to seasonal activity of respiratory adenoviruses, rhinoviruses, and enteroviruses could involve “different transmission mechanisms, the role of asymptomatic transmission, and prolonged survival of these nonenveloped viruses on surfaces, all of which might make these viruses less susceptible to nonpharmaceutical interventions.”

Dr. Brewer, of UCLA, agreed.

All the viruses basically “flatline except for adenoviruses and enteroviruses, and they behave a little differently in terms of how they spread,” he said. “Enteroviruses are much more likely to be fecal-oral spread than the other viruses [in the study].”

The delayed circulation of parainfluenza and human coronaviruses may have resulted from suspension of in-person classes through late winter 2020, they write, but that doesn’t explain the relative absence of pneumovirus activity, which usually affects the same young pediatric populations as RSV.

Dr. Brewer said California is seeing a surge of RSV right now, as are many states, especially throughout in the South. He’s not surprised by RSV’s deferred season, because those most affected – children younger than 2 years – are less likely to wear masks now and were “not going to daycare, not being out in public” in 2020. “As people are doing more activities, that’s probably why RSV has been starting to go up since April,” he said.

Despite the fact that, unlike many East Asian cultures, the United States has not traditionally been a mask-wearing culture, Dr. Brewer wouldn’t be surprised if more Americans begin wearing masks during flu season. “Hopefully another thing that will come out of this is better hand hygiene, with people just getting used to washing their hands more, particularly after they come home from being out,” he added.

Dr. Brewer similarly emphasized the importance of flu vaccination for the upcoming season, especially for younger children who may have poorer natural immunity to influenza, owing to its low circulation rates in 2020-2021.

The study was funded by the CDC. Dr. Brewer and Dr. Olsen have disclosed no relevant financial relationships.

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