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 of viral samples from a patient in Louisiana hospitalized with the first severe case of bird flu showed ...

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 ...

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

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

Genetic analysis of H5N1 bird flu viruses from a severely ill patient in Louisiana revealed multiple mutations that may ...

A genetic analysis of samples from the patient in Louisiana recently hospitalized with the country’s first severe case of ...

A genetic analysis of the H5N1 bird flu in a Louisiana patient reveals potential mutations for human transmissibility, says ...

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.