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

The United States is facing a growing threat from the H5N1 bird flu outbreak. Scientists are concerned that existing vaccines ...

The findings come at a time when outbreaks of bird flu -- a different subtype of the ... Study Shows Drop in Use of Antiviral Medications in Young Children With Influenza Dec. 17, 2024 — Despite ...

Specimens from patients that are positive for the influenza A virus but negative for seasonal flu subtypes such as A(H1) and A(H3) should be prioritized for further testing in a public health ...

A stark example of this came in 2009, with the emergence of the H1N1 'swine flu' subtype that killed an estimated 151,700 to 575,400 people worldwide. A protein on the surface of influenza ...

The influenza vaccine ... strain with the dominant virus strain circulating in Beijing contributed to its effectiveness. Variation in effectiveness among subtypes and age groups highlights ...

Not long after the first flu ... subtypes into two broad categories, known simply as group 1 and group 2. There are 12 hemagglutinin subtypes isolated from a number of different influenza viruses ...

While any human infection caused by a novel influenza A virus subtype is an event that has the potential for high public health impact and must be notified to the WHO, it has assessed the current ...

WASHINGTON — This year’s harsh flu season – the ... or other signs of “influenza-associated encephalopathy or encephalitis” — and a more severe subtype called “acute necrotizing ...