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 ...

Most human cases of bird flu in North America have been mild, a fact that’s underscored by a new study of the first 46 ...

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

The CDC has revealed the red flags it is monitoring for that suggest that bird flu was about to become the world's next pandemic.

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 ...

The call to authorize a vaccine comes after the CDC announced that a person in Louisiana was hospitalized with the country's first known case of severe illness caused by the virus earlier this month.

Tiny genetic alterations could help the bird flu virus enter cells in the upper respiratory tract, the C.D.C. said. But there is no sign that mutations are widespread in nature. By Benjamin ...

Over the past year, bird flu has spread far beyond America's avian creatures. Largely concentrated among farm animals, it's also hit zoos, domestic pets and even people. The risk to public health ...

Northwest Naturals issued a voluntary recall for a batch of pet food after a cat died of bird flu in Oregon, officials said. Testing done by the U.S. Department of Agriculture's National ...

The first human case of bird flu in Los Angeles County was reported Monday. Los Angeles County health officials are warning against feeding pets raw food after one brand had samples of bird flu ...

The death of an Oregon house cat and a pet food recall are raising questions about the ongoing outbreak of bird flu and how people can protect their pets. Bird flu has been spreading for years in ...