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

Public health officials are sounding the alarm after bird flu mutations were discovered in a Louisiana patient.

After someone in southwest Louisiana was hospitalized with a severe case of bird flu, the first such illness reported in the ...

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

A person in Louisiana has contracted the nation's first severe case of bird flu after the virus mutated inside their body, ...

ALEXANDRIA, La. (KALB) - The bird flu virus in a patient in Louisiana has likely mutated while they were in the hospital.

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

The bird flu virus found in a severely ill patient hospitalized in the United States has mutated to become better adapted to ...

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

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

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