CDC has issued a Health Alert Network (HAN) advisory on New World screwworm (NWS) in northern Mexico. There are no U.S. human cases. It’s important to know the signs of infestation in people & animals to help prevent this parasitic disease from spreading. https://t.co/iV1b0VK9Nu pic.twitter.com/e9AwOYKVOk

— CDC Emerging Infections (@CDC_NCEZID) January 21, 2026