Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

The H5N1 bird flu virus has historically extracted a heavy toll when it infects humans, with nearly half of confirmed cases ...

The parasitic fly that attacks warm-blooded animals was eliminated from the United States in the 1960s, but it’s creeping toward the Texas-Mexico border.

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

The fatality rate for H5N1 highly pathogenic avian influenza in humans has historically been high, with more than half of ...

The H5N1 bird flu has been spreading widely among wild birds, poultry and other animals around the world for several years, and starting early last year became a problem in people and cows in the U.S.

By Sara Frueh Over the past three years, bird flu — caused by the avian influenza A (H5N1) virus — has extended its reach around the U.S. and across many species. The virus arrived in wild birds, but ...