The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

three subtypes of hemagglutinin (H1, H2, and H3) and two subtypes of neuraminidase (N1 and N2) have caused sustained epidemics in the human population. Birds are hosts for all influenza A subtypes ...

Influenza strains are referred to by a shorthand code ... the whole hemagglutinin and asked ‘which areas can change and still allow the hemagglutinin to function?’” Heaton explained. “And the answer ...

Brass et al. 1 used fluorescence microscopy to score the abundance of the influenza envelope glycoprotein hemagglutinin as a marker of infection with influenza A/PR/8/34 (PR8) virus in siRNA ...

The best anti-flu responses target the two influenza surface proteins, hemagglutinin and neuraminidase ... targeted proteins ...

U.S. approves conditional use of avian influenza vaccine amid spreading outbreak U.S. greenlights temporary use of bird flu ...