H5N1 bird flu samples collected from a severely ill patient in Louisiana show signs of mutations that may make the virus more transmissible to humans, the Centers for Disease Control and Prevention reported Thursday. The unidentified patient, who was ...

Federal health officials on Thursday called for more testing of employees on farms with bird flu after a new study showed that some dairy workers had signs of infection, even when they didn't report feeling sick. Farmworkers in close contact with infected ...

To address the rising bird flu cases, the US government has committed $590 million to fast-track Moderna's mRNA bird flu vaccine development. The vaccine aims to combat current bird flu strains in wild birds,

A person in Washington is presumed infected with bird flu virus. Health officials in the state do not know the source.