Federal health officials say that not only has a Louisiana resident contracted the first severe case of bird flu in the U.S., ...

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

Federal health officials have confirmed unsettling new details about the first United States case of severe bird flu, ...

A virologist explains that why this probably isn’t the big one — but that it’s a sign of bad things happening with the virus.