Samples from a hospitalized patient in Louisiana show changes that could make the H5N1 virus spread more easily between ...

The ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe ...

Genetic analysis suggests the bird flu virus has the capacity to mutate in ways that could make it more transmissible to ...

The genetic analysis of the H5N1 avian flu virus in specimens from the nation's first severely ill hospitalized patient in ...

The Oregon Department of Agriculture (ODA) yesterday reported that a house cat has died from H5N1 avian flu after eating raw ...

Scientists believe the mutations may allow the virus to better bind to receptors in the upper airways of humans.