Scientists are investigating a mutation in the H5N1 avian influenza virus, raising concerns about a potential human pandemic.

A person in Louisiana is hospitalized with H5N1 bird flu after having contact with sick and dying birds suspected of carrying ...

The president-elect's choices to lead the Department of Health and Human Services, as well as agencies such as the National ...

Cats "shed the virus through both respiratory and digestive tracts, potentially creating multiple routes of exposure to ...