Public Health

Bird flu (H5N1) resource center


Bird flu (H5N1) is caused by an infection with avian influenza type A viruses, which primarily spread among wild aquatic birds and can infect other animals. Highly pathogenic avian influenza (HPAI) viruses cause severe disease and high mortality in infected poultry.

In late March 2024, a human case of influenza A(H5N1) virus infection was identified after exposure to dairy cows presumably infected with bird flu. CDC has reported additional, sporadic human cases in people who had exposure to infected dairy cows. According to the CDC, the current risk to the general public is low.

Learn more from the AMA on questions patients may have and how to answer.

  1. CDC advice for clinicians on raw milk and bird flu (PDF)

  2. FDA updates on avian flu

  3. USDA bird flu in livestock detection guidance

What you need to know about bird flu

Vice President of Science, Medicine and Public Health, Andrea Garcia, JD, MPH, discusses the latest developments.

Find more: