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7h ago

CDC Ends Emergency Response to H5N1, Transitions to Routine Monitoring

Officials said routine flu monitoring will carry on under the CDC’s influenza division with capacity to scale up if new cases emerge

A sign of the CDC is seen on a podium during the meeting of the members of the Advisory Committee on Immunization Practices, as the U.S. Centers for Disease Control and Prevention's (CDC) advisory panel for vaccines convenes in Atlanta, Georgia, U.S. June 25, 2025.  REUTERS/Megan Varner
US Bird Flu-Duck Farm. Ducks walk around their barn at the Crescent Duck Farm in Aquebogue, N.Y., Thursday, May 22, 2025. (AP Photo/Seth Wenig)
CDC data shows 70 human bird flu cases were reported in the U.S. Photo: Jay L Clendenin/Getty Images
Influenza A H5N1/bird flu virus particles round and rod-shaped red and yellow. Creative composition and colorization/effects by NIAID transmission electron micrograph imagery is courtesy of CDC. (Imago via Zuma Press/TNS)

Overview

  • CDC deactivated its H5N1 emergency response on July 2 after a sustained decline in animal infections and no human cases since February 2025.
  • HHS said the shift frees emergency resources for routine programs while preserving capacity to rapidly re-escalate if the virus resurges.
  • Since 2022, nearly 175 million birds have been affected in the U.S., and the virus spread to dairy cattle in early 2024 across more than 1,000 herds in 17 states.
  • Seventy human infections have been confirmed, including one death in January, with the last reported case occurring in February.
  • CDC career scientists initiated the wind-down, noting the agency can ramp up its response within hours should new threats arise.