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 ...

Millions of birds in U.S. poultry farms and some cattle herds have been affected, but the overall risk to humans remains low. Still, a number of human cases have been documented as a new CDC report ...

As spring weather sets in, fears of a bird flu pandemic have not materialized, and there is less cause for worry than there was in the winter. Experts say the short-term risk of a pandemic is low, but ...