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.

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

Public health officials have warned that new mutations of bird flu with human flu could have dangerous consequences.

A 13-year-old girl in Canada became so sick with H5N1, or bird flu, in late 2024 that she had to be put on a ventilator.

Gov. Newsom declared a state of emergency as the virus continues to infect dairy herds across the country — including more ...

So far, the H5N1 virus isn't transmitted between people — but the CDC has found a mutation in a human case "concerning." ...

High Path Avian Influenza, otherwise known as bird flu, has been detected in nearly one million chickens in the Miami Valley. As shown on News Center 7 at 6:00, state veterinarian Dr. Dennis ...

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

Avian flu or bird flu was detected in wastewater in Phoenix, Surprise and Tempe, the Maricopa County Department of Public Health confirmed on Monday. All three of the cities conduct wastewater ...

Dr. Leana Wen said Sunday that the lack of testing for bird flu doesn't mean that the virus isn't alive in humans, and that she feels the federal government "should have learned our lesson from ...