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.

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

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

"We have outbreaks in poultry in all 50 states," Dr. Leana Wen tells Face the Nation's Major Garrett The post New Bird Flu ...

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

Federal health officials have confirmed unsettling new details about the first United States case of severe bird flu, ...

H5N1 usually spreads to people through contact with infected or dead birds, as with the Louisiana patient. Currently, there ...

Public health officials are sounding the alarm after bird flu mutations were discovered in a Louisianan patient. Dozens of ...

A person in Louisiana has the first severe illness caused by bird flu in the U.S., health officials said Wednesday.

Among 61 people infected with bird flu in the U.S. this year, a Louisiana patient is the first to have "severe" disease ...

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

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