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.

The virus in the first severe human bird flu case in the U.S. was found to have mutated. Newsweek's live blog is closed.

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

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

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

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

The US hasn’t learned lessons from the Covid-19 pandemic that it could use to mitigate the threat of pathogens like H5N1 bird ...

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 ...

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

There's a new concern that the virus could evolve to spread from human to human.