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

The number of influenza cases is surging across the United States, putting significant strain on many hospitals. We asked the ...

Recent viral mutations have shown avian influenza’s adaptability to mammalian hosts, prompting infectious disease, animal ...

The Vaccines and Related Biological Products Advisory Committee (VRBPAC) had been scheduled to meet to discuss the strains ...

(NEXSTAR) – The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the Centers for Disease Control and Prevention since the ...

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

Influenza A is divided into subtypes based on two proteins on the virus's surface: hemagglutinin and neuraminidase. These lead to different combinations—with H1N1 and H3N2 presently the most ...

Other factors that may be pushing the surge include an influenza A subtype called H3N2 that can cause more severe illness. People also appear to be traveling more, increasing exposure. Castel ...

Dr. Gary Green, an infectious disease expert with Sutter Health, said the earlier peak in flu cases, about a month ago, was caused by the spread of a mix of Influenza A subtypes H1N1 and H3N2.

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 ...