WHO urges heightened vigilance on potential spread of bird flu in cows

FILE - A line of Holstein dairy cows feed through a fence at a dairy farm in Idaho on March 11, 2009. Since March 2024, a strain of avian influenza has been found in dairy cow herds in eight U.S. states. FILE - Researchers collect samples of wildlife, where the H5N1 bird flu virus was detected, at Chilean Antarctic Territory, Antarctica, in this handout photo obtained March 13, 2024. (Instituto Antartico Chileno/Handout via Reuters)