The H5N1 Avian influenza is decimating bird populations ... This virus is similar to human-adapted influenza currently circulating (H1N1 and H3N2) but, to date, has not infected many humans ...

The 2009 influenza pandemic A(H1N1)pdm09 of swine origin and the continued circulation of highly pathogenic avian H5N1 strain in humans are stark reminders of the unpredictable nature of the ...

Virologists are also concerned about a situation where a person simultaneously gets infected with H5N1 and human influenza virus H3N2 or H1N1, each of which is currently circulating as flu activit ...

The new virus was named A(H3N2). As in 1958, it immediately and totally replaced the previous virus and in 1970, the modified vaccine was still bivalent, but it contained A(H3N2) and B.

While certain subtypes of influenza A — A(H1N1) and A(H3N2) — are common in humans ... for testing for potential H5N1 infection. "The Centre asked us to conduct surveillance for avian flu ...