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 person in Louisiana has contracted the nation's first severe case of bird flu after the virus mutated inside their body, ...

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 Centers for Disease Control and Prevention confirmed the first case of severe bird flu in the U.S. on Wednesday.

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

The Centers for Disease Control and Prevention (CDC) has identified mutations in the the first severe bird flu case in the US ...

The Centers for Disease Control and Prevention called it the first severe case in the U.S., though the risk to most of the ...

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

A patient in Louisiana has been hospitalized with a severe case of H5N1 bird flu, the US Centers for Disease Control and ...

While dogs are not common carriers of bird flu, they can become infected, especially if exposed to sick or dead birds.

The CDC said the patient's sample showed mutations in the hemagglutinin (HA) gene, the part of the virus that plays a key ...