Should we be worried about the first human case of the H5N2 strain of bird flu? H5N2, confirmed in a man in Mexico who died, is different from the bird flu virus affecting cows in the U.S. NBC News Health
Should we be worried about the first human case of the H5N2 strain of bird flu? H5N2, confirmed in a man in Mexico who died, is different from the bird flu virus affecting cows in the U.S.
