A new strain of the H5N1 bird flu virus was detected in dairy cows, but the risk of human transmission remains low. The nation’s milk supply is safe because pasteurization kills the bird flu virus.

U.S. dairy cattle tested positive for a strain of bird flu that previously had not been seen in cows, the U.S.

More Americans could be unknowingly carrying bird flu, according to a new report from the Centers for Disease Control and ...