The virus in the first severe human bird flu case in the U.S. was found to have mutated. Follow Newsweek's live blog for ...

The CDC determined the person was likely exposed to H5N1 from sick or dead birds in a ... at a commercial poultry facility ...

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in ...

California Governor Gavin Newsom has issued a state of emergency in response to a bird flu outbreak. California is in a state of emergency due to a recent bird flu outbreak. As residents grapple with ...

Reports that cows have been infected despite farmers' preventive measures indicate there are multiple routes of transmission ...

Nearly all of California’s cases of bird flu in people were due to ... the first instance of severe illness linked to the ...

After Gov. Gavin Newsom last week declared an emergency stemming from bird flu’s spread in dairy herds, local public health ...

Officials have discovered the virus in 645 dairy herds, more than in any other state so far. In a stark acknowledgment of the ...

Northwest Naturals is recalling a line of its pet food after authorities Oregon linked the death of a cat to a batch ...

Los Angeles County health officials have identified three more cats with presumptive H5N1; the source of the virus has not ...

California Gov. Gavin Newsom declared a state of emergency Wednesday to combat bird flu, which has spread ... suspected of being infected with H5N1, the Louisiana health department said last week. It ...

The first severe case of H5N1 bird flu was confirmed in Louisiana. Here is a map of other states that have been affected.