For months, bird flu was seemingly everywhere in the U.S.: news headlines reported the highly pathogenic H5N1 avian influenza ...

Influenza viruses like bird flu can mix and match their genomes, and this has played a role in at least three of the last ...

The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

The virus, which scientists call H5N1, has spread like wildfire around the globe in recent years, surprising and horrifying ...