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

The CDC said Thursday its analysis of samples from a Louisiana patient with bird flu showed mutations not seen in samples ...

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

A backyard flock in Vermont was sickened with H5N1, agricultural officials said on Thursday, following other reports of bird ...

The CDC has confirmed a total of 66 human cases of bird flu across the United States as of Friday, although the number is ...

The agency, in its latest update released Thursday, said the mutations were not found in samples taken from wild birds, ...

A genetic analysis of samples from the patient in Louisiana recently hospitalized with the country’s first severe case of ...

The CDC's analysis revealed changes in the hemagglutinin (HA) gene, a critical component for the virus's ability to attach to ...

The U.S. Centers for Disease Control and Prevention said on Thursday its analysis of samples from the first severe case of ...

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