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.

The virus is spreading among animals, while viral mutations raise concerns about potential adaptation to human hosts.

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.

APHIS classifies the flock as a commercial operation – the state’s first since the U.S. outbreak began in 2022.

Outbreaks of the highly pathogenic H5N1 flu have spread in cattle herds across ... and person-to-person transmission has not ...

Outbreaks of the highly pathogenic H5N1 flu have spread in cattle ... not been documented. View the map below to see what states have recorded human cases of the bird flu.

An epidemiologist makes the case that a rush of research to stop a swine flu outbreak led to an accidental lab release of an ...

Washington ranks “high,” while Oregon outpaces entire region and ranks among highest in nation in latest CDC update.