Felines of all varieties tend to explore and hunt smaller prey, such as birds and mice, which can carry bird flu.

The CDC warns samples of the bird flu virus show signs of mutations that could make it more transmissible to humans. The CDC ...

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

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

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

Growing concerns surrounding the transmission of H5N1 bird flu. The CDC reports that samples collected from a severely ill ...

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 ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe ...

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

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

Health officials are alarmed by a mutated H5N1 bird flu virus in a Louisiana patient, raising concerns about potential human ...

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