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 ...

A new mutation and the first severe case of H5N1 bird flu discovered in a human in Louisiana has raised concern among some ...

Genetic analysis suggests the H5N1 virus has the capacity to mutate in ways that could make it more transmissible to humans.

New research shows that the highly contagious bird flu, found in the nation’s first severe human case, shows signs of a rare ...

The patient was likely infected after having contact with sick and dead birds in a backyard flock, the US Centers for Disease Control and Prevention said earlier this month.

California Governor Gavin Newsom has issued a state of emergency in response to a bird flu outbreak. California is in a state of emergency due to a recent bird flu outbreak. As residents grapple with ...