A new report suggests that more Americans may be walking around with bird flu − and not even know it. Researchers from the Centers for Disease Control and Prevention randomly tested 150 veterinarians for H5N1,

A new study shows the bird flu has silently spread from animals to some veterinarians. It echoes two smaller studies that detected evidence of infection in previously undiagnosed farmworkers.

How does bird flu spread? Can people get bird flu? Bird flu can infect birds as well as mammals, including pigs, cattle and cats. People can also get infected when they come into

Yahoo News provides the latest updates on the spread of bird flu in the U.S. and its effect on rising egg prices and shortages.

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.