The Centers for Disease Control and Prevention (CDC) has confirmed the first severe case of bird flu in the United States, ...

Bird flu could be mutating to become more transmissible to humans, scientists have warned, as the US reported its first ...

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

Authorities and Northwest Naturals have strongly advised consumers who purchased the recalled product to discard it ...

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.

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

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

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

The agency, in its latest update released Thursday, said the mutations were not found in samples taken from wild birds, suggesting the virus changed over the course of the patient’s infection.

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