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 ...
In this prospective observational study, immune protection against H5N1 and H7N9 avian influenza virus (AIV ... likely primed by A(H3N2) subtype clade 2 virus. 1978-1997 (group 3 [G3]; n ...
Influenza A (H5N1) and influenza A (H7N9) are the most common bird flu subtypes that have spread to humans in the past. The country's recent bird flu cases were linked to influenza A (H5N1).