H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally caused isolated human cases that have quite often been fatal. But last year ...

LONDON -- A new theory proposes that mad cow disease may have come from feeding British cattle meal contaminated with human remains infected with a variation of the disease. The hypothesis, outlined ...

H5N1 bird flu is branching out. New data from the Centers for Disease Control and Prevention indicates that a second type of H5N1 has likely spread from dairy cows to humans. The CDC and health ...