The agency, in its latest update released Thursday, said the mutations were not found in samples taken from wild birds, suggesting the virus changed over the course of the patient’s infection.

The U.S. isn't fully capturing spread in pets like cats, compared to surveillance for livestock and people, said the study’s ...

The ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe illness, but also due to troubling new instances of infections in cats.

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 ...

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

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