Recommendations on the strain composition of influenza virus vaccines for the 2025-2026 US season have been issued by FDA.

Based on the data presented, the committee agreed that there was a need to change the influenza A/H3N2 virus strains from the 2024-2025 formula. Recommendations on the strain composition of ...

Reuters, the news and media division of Thomson Reuters, is the world’s largest multimedia news provider, reaching billions ...

This season's influenza vaccine may have been a poor match to a strain of the flu virus that caused many infections this winter, early data released by the Centers for Disease Control and ...

“What is interesting about this year is that we have concurrent high levels of circulation of H1N1 and H3N2. It’s an influenza A outbreak primarily, but within that, both subtypes are present ...

Not long after the first flu shot was introduced in 1945 by University of Michigan virologist Thomas Francis and his ...

Older adults who were exposed to seasonal flu viruses that circulated prior to 1968 are more likely to have some protection against H5N1, and children would benefit more from H5N1 vaccines.

Despite variations by age group and influenza virus type, the 2023-2024 influenza vaccine was protective against outpatient illness in pediatric and adult patients.

So far, fewer than half of US children and older adults have been vaccinated during this year’s high-severity flu season.

Previous exposures to older flu strains prime the immune system to produce antibodies against bird flu (H5N1).

Kids have been hit especially hard: as of February 22, 98 children—most of them unvaccinated—have died from flu in the U.S.

Early flu exposure helps immunity against H5N1 infection, with older adults having stronger antibody responses.