As the virus infects more humans, especially if those cases are not closely surveilled, it creates more opportunities for the virus to mutate and mix with other viruses that are already good at ...

Health officials in Congo suspect a mysterious disease that killed 52 people and sickened 943 in Equateur province to be ...

The recent outbreak of the H5N1 avian influenza virus in the U.S. and the potential for it to mutate has raised concerns among the scientific community that it could result in human-to-human ...

The flu has hit Minnesota especially hard this season, sending more than 5,600 people to the hospital and threatening to help bird flu mutate and become a more serious public health risk.

Rising numbers of great-horned owls, bald eagles and red-tailed hawks have been getting sick and dying of bird flu this ...