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" ...

Amid a "concerning" new mutation in bird flu that may indicate the virus could begin to more easily infect humans, what are ...

Each week some revelation about bird flu seems to flutter through the news cycle. Here's what the latest research is saying ...

Scientists are issuing warnings after a bird flu patient showed mutations that could increase the transmission of the virus.

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 ...

Exclusive reporting reveals how the United States lost track of a virus that could cause the next pandemic. Problems like the ...