A virologist explains that why this probably isn’t the big one — but that it’s a sign of bad things happening with the virus.

The patient in Louisiana who was hospitalized with severe bird flu illness was found to have a mutated version of the virus.

Federal health officials say that not only has a Louisiana resident contracted the first severe case of bird flu in the U.S., ...

In a positive finding, the CDC emphasized that there is no evidence the virus has spread from the Louisiana patient to others ...

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

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 ...

When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, ...

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

"I feel like we should've learned our lesson from COVID, that just because we aren't testing doesn't mean the virus isn't there," Dr. Leana Wen said.

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