H5N1 (Avian Influenza)

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Discover comprehensive information and resources on HPAI H5N1 (Avian Influenza), including updates, situational reports, news, and published research. Explore this page to stay informed about the latest developments and insights HPAI H5N1.

About HPAI H5N1

According to the Centers for Disease Control and Prevention (CDC), avian influenza, commonly referred to as bird flu, is caused by infection with avian influenza Type A viruses. These viruses are naturally found in wild aquatic birds worldwide and can infect domestic poultry, as well as other bird and animal species. While bird flu viruses typically do not infect humans, sporadic human infections have been reported.

Currently, the Highly Pathogenic Avian Influenza (HPAI) H5N1 strain is spreading globally, affecting wild birds and domestic poultry alike. Additionally, the virus has been identified in mammals, including dairy cows, foxes, mink, skunks, bears, sea lions, otters, and even domestic cats and dogs.

Furthermore, the CDC indicates that the widespread presence of A(H5N1) bird flu viruses among wild birds, poultry, and some mammals—including cows—creates additional exposure opportunities for humans. Consequently, an increase in sporadic human infections may occur due to exposure to birds, cattle, and other infected animals.

Resources

Updates & Situational Reports

CDC | H5N1 Human Case Update

As of June 23, 2025, there have been 70 confirmed human cases in the United States, including one fatality associated with the virus. The CDC has stated that there has been no evidence of person-to-person transmission of the virus, and the overall public health risk remains low.
As of June 23, 2025:
13,324 wild birds detected as of 6/23/2025 | Full Report
51 jurisdictions with bird flu in wild birds
174,804,048 poultry affected as of 6/13/2025 | Full Report
51 jurisdictions with outbreaks in poultry
1,073 dairy herds affected as of 6/5/2025 | Full Report
17 states with outbreaks in dairy cows

Unofficial HPAI H5N1 Map

Data was sourced and imported from FAO EMPRES, USDA APHIS, WAHIS, and open source news reports beginning in late 2022 to current.

Click here to view the map

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Region 7 Infectious Disease Briefings

The GCHS, in collaboration with the Region VII Disaster Health Response Ecosystem (R7DHRE) conducts biweekly meetings with local and state public health and healthcare representatives. These meetings focus on reviewing and discussing recent developments related to current infectious disease challenges. Dr. James V. Lawler, MD, MPH, FIDSA, presents comprehensive updates on data and advancements at local, state, national, and international levels. Additionally, regional experts offer insights into current outbreaks and clinical situations within Region 7. Register here.

Recent Recordings | Archived Recordings

H5N1 (Avian Influenza)

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About HPAI H5N1

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Data was sourced and imported from FAO EMPRES, USDA APHIS, WAHIS, and open source news reports beginning in late 2022 to current.

News

Another Bird Flu case confirmed in Cambodia

On the brink: H5N1 and the risk to human health

Cambodian human avian flu infection linked to poultry outbreak

Bird flu detected at 4th commercial farm in Maricopa County

Arizona: Third commercial farm tests positive for bird flu

Tracking the Threat: How a New H5N1 Virus Variant Took Hold Across Europe

China reports a new H5N1 case

Cambodia reports 11-year-old boy is country’s fourth bird flu death this year

Brazil finds bird flu in wild bird, investigates potential case on commercial farm

As Bird Flu Spreads, Vaccine Shows Promise for Protecting Cattle

World Crazy for Chicken Is Losing Its Biggest Supplier

More than 2 million hens in Arizona flock hit by avian flu