Last year's 'triple-demic' marked the beginning of what may be a new normal: a confluence of respiratory infections — RSV, influenza, and covid-19 — will surge as the weather cools each year.
Reviewed by Lily Ramsey, LLMOct 13 2023 Last year's "triple-demic" marked the beginning of what may be a new normal: a confluence of respiratory infections — RSV, influenza, and covid-19 — will surge as the weather cools each year.
"It seems like the pandemic reminded them of how important vaccination is," said Brian Poole, a microbiologist at Brigham Young University in Utah. In a study of college students, Poole and other researchers found that flu vaccination rates have nearly tripled since 2007, from 12% to 31% in the respiratory infection season of 2022-23. Only a minority of students expressed "vaccine fatigue.
Messaging to minimize the toll of covid also makes vaccines seem unnecessary, with 24% of Republicans leaning toward getting the updated covid shot versus 70% of Democrats in the KFF poll. A larger share of vaccine-eligible adults said they planned to get, or have gotten, the flu shot and a new RSV vaccine.
The effectiveness of flu vaccines varies depending on how well its formula matches the virus circulating. This year's vaccine appears more protective than last year's, which reduced the risk of hospitalization from the flu by about 44% among adults. This year, researchers expect an effectiveness of about 52%, based on data collected during South America's earlier flu season. Its benefit was higher for children, reducing hospitalizations by 70%.
The FDA greenlighted new RSV vaccines from the pharmaceutical companies GSK and Pfizer this year. On Sept. 22, the CDC recommended that pregnant mothers get vaccinated to protect their newborns from RSV, as well as infants under 8 months old. The disease is the leading cause of hospitalization for infants in the United States. The agency also advises people age 60 and older to get the vaccine because RSV kills between 6,000 to 10,000 older adults each year.
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