What we know about the deadliest U.S. bird flu outbreak in 7 years
Osceola, Iowa, United States
Mar 31, 2022
Nearly 23 million birds have died as a highly pathogenic bird flu virus tears its way through farms and chicken yards. It has spread to at least 24 states in less than two months. One of the worst-hit states is Iowa, where more than 5 million birds died at an egg-laying facility in Osceola on March 31.
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