The H5N1 bird flu outbreak in the U.S. has so far been shockingly mild. Researchers have some theories as to why.

Australia's surveillance of bird flu has been described as a possible "model" to follow globally, with the spread of the H5N1 strain of the virus causing concerns for international health authorities.

Biosecurity New Zealand has placed strict movement controls on a commercial rural Otago egg farm, after testing confirmed a high pathogenic strain of avian influenza in chickens that has likely ...

A teen in British Columbia recently became critically ill after becoming infected with H5N1. H5N1 is a highly pathogenic ...