Avian Influenza

HPAI Detections in Commercial Poultry & Backyard Flocks

Last Updated: February 14, 2025

The dashboard below is designed to provide a current snapshot of confirmed HPAI detections in the United States. While it also includes summary data compiled since the outbreak began, looking at cases confirmed over the last 30 days provides the best picture of how the virus is currently impacting U.S. birds. We expect the number of cases to ebb and flow as the levels of virus continues to change in different areas based on wild bird movement.

To provide context on the overall size of the U.S. poultry flock, there are more than 378.5 million egg-laying chickens in the United States. In 2023, more than 9.4 billion broiler chickens and 218 million turkeys were processed in the United States (data from USDA National Agricultural Statistics Service).

In February 2022, USDA’s APHIS announced an HPAI A(H5N1) virus outbreak in a commercial poultry facility followed by outbreaks in three U.S. states in commercial poultry facilities and a backyard flock, marking the first HPAI A virus detections in commercial poultry in the United States since 2020.

Since February 2022, additional H5N1 bird flu outbreaks have been identified in poultry, including both commercial and backyard flocks in multiple states. The latest bird flu outbreaks in poultry in the United States are available from the U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) webpage at USDA APHIS | 2022 Confirmations of Highly Pathogenic Avian Influenza in Commercial and Backyard Flocks.

Preliminary genetic sequence data from some of the H5N1 bird flu viruses obtained from infected poultry suggests they belong to clade 2.3.4.4b, like most of the viruses recently detected in wild birds in the United States.