Avian influenza has spread far beyond the nation's birds, infecting all manner of creatures from zoo animals, wild mammals, ...

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

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.

The U.S. Centers for Disease Control and Prevention said on Thursday its analysis of samples from the first severe case of ...

As Mark McAfee — the maverick leader of California’s largest raw milk dairy — works on getting his Fresno County dairy out of ...

As flu season ramps up in the U.S., influenza is not as simple as it first appears, with several different strains in play.

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

California Gov. Gavin Newsom declared a State of Emergency to streamline the state's response to avian flu. More than half of the human cases in the U.S. so far have been in California.

The H5N1 strains are becoming more concerning as the first severe U.S. case has been detected and California declared a state ...

Bird flu infections are increasing in humans and animals. Learn about the risks, transmission methods, and safety measures to ...

California declared a state of emergency after dozens of cases were reported there since April. But the CDC says the risk to ...

The current risk to the public is low, according to the CDC, but there are certain occupations and situations that can ...