H3N8 is a subtype of the species Influenza A virus (sometimes called bird flu virus). H3N8 is now endemic in birds, horses and dogs.

H3N8 is suspected of causing a human pandemic in either 1889 or 1900. Sources differ; some say the 1889 pandemic was caused H2N2. The experts also differ on exactly how sure we can be that either were involved. Influenza_A

It was the subtype that was responsible for over one-forth of the flu infections in wild ducks in a 1997 study Coinfection of Wild Ducks by Influenza A Viruses.

See also

• Horse flu
• Canine influenza

References