The CDC has issued a Health Alert Network (HAN) advisory following confirmed New World screwworm (NWS) cases in Tamaulipas, Mexico, a state bordering Texas. While no human or animal cases linked to this outbreak have been identified in the United States as of January 20, 2026, officials warn of potential geographic spread.
The advisory is intended to increase awareness among clinicians, public health agencies, and the public, and outlines CDC guidance on case recognition, reporting, specimen collection, diagnosis, and treatment. Health officials are urging vigilance, particularly in border regions, and recommend close monitoring and early reporting to support rapid response if cases emerge.