For example, if a human gets infected with a bird flu and also carries a human influenza A virus, these two viruses can ...

Previous seasonal flu infections and vaccinations may protect us against infection from the highly pathogenic H5N1 bird flu outbreak.

A Canadian teen's severe bird flu infection has highlighted growing concerns about the H5N1 virus, commonly known as bird flu ...

Doctors say the case of a teen left in critical condition shows H5N1 "can cause severe human illness." Mutations in the virus are deepening concerns about the spread of H5N1.

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.

Louisiana reported a person hospitalized with a severe case of H5N1, and the USDA has begun bulk milk testing ...

The U.S. reported its first severe human case of bird flu on Wednesday in a Louisiana resident who is hospitalized in ...

Highly pathogenic avian influenza recently was found in an Ottawa County poultry facility, Michigan officials said, the first time the disease considered a threat to humans has been found in a ...

Los Angeles public health officials are investigating two possible cases of fatal bird flu found in cats that consumed recalled raw milk from the Fresno-based dairy Raw Farm LLC. The Los Angeles ...

Maricopa and Coconino counties reported new cases of bird ... Evidence of the bird flu virus, H5N1, in Coconino County wastewater, is the first of its kind this year in Arizona.