AdvertisementAs bird flu spreads in cows, here are 4 big questions scientists are trying to answerUpdated April 26, 2024Will StonefacebookEmailBird flu is spreading through U.S. dairy cattle. Scientists say the risk to people is minimal, but open questions remain, including how widespread the outbreak is and how the virus is spreading. (AFP via Getty Images)This article was originally published on April 26, 2024.