The virus has spread among dairy cattle, humans and other mammals. But officials say the current public health risk is low.

A devastating bird flu outbreak has killed 20 big cats at the Wild Felid Advocacy Center of Washington, a nonprofit animal ...

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 ...

Tiny genetic alterations could help the bird flu virus enter cells in the upper respiratory tract, the C.D.C. said. But there ...

A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the first severe case of the ...

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

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

The CDC said that testing of a person with a severe case of bird flu indicated the virus had mutated but the risk remains low ...

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

A genetic analysis of samples from the patient in Louisiana recently hospitalized with the country's first severe case of H5N1 bird flu show the virus likely mutated in the patient to become ...