Here’s what to know about the United States’ first confirmed severe case of H5N1 avian influenza—and how to protect yourself.

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

The bird flu virus found in a severely ill patient hospitalized in the United States has mutated to become better adapted 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 new mutation and the first severe case of H5N1 bird flu discovered in a human in Louisiana has raised concern among some ...

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 ...

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

It’s safe to drink pasteurized milk but people run a high risk if they drink raw milk” — Linda Pinfold, agricultural ...

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

Scientists are issuing warnings after a bird flu patient showed mutations that could increase the transmission of the virus.