Last Modified: December 20, 2024
A man and women looking at paperwork with cows in the background

The U.S. Department of Agriculture, Food and Drug Administration, Centers for Disease Control and Prevention, and State veterinary and public health officials continue responding to detections of HPAI in livestock. 

Our collaborative efforts are helping to protect farmworkers and farmers, the health and welfare of livestock animals, and the safety of our Nation’s food supply. As the situation evolves, we will continue to post updated information below.

Announcements

1/17/25
USDA Shares Enrollment of Six Additional States in Its National Milk Testing Strategy for H5N1
1/17/25
APHIS Updates Policy to Enhance Surveillance of Turkey Flocks in Highly Pathogenic Avian Influenza Affected States
1/16/25
USDA Reduces HPAI Restrictions on Poultry from France and the European Union
View All

Situation Updates

HPAI Confirmed Cases in Livestock (USDA-APHIS)
Many cows in a field on a farm
H5N1 and U.S. Meat Supply Safety (USDA-FSIS)
brown cows in a green field
HPAI and Milk Safety Updates (FDA)
farmer pouring milk from one container into another
Human Health and H5N1 Bird Flu (CDC)

Science and Research

What's New?

10/04/24 | U.S. Government Highly Pathogenic Avian Influenza Research Priorities (193.55 KB)

9/24/24 | APHIS Releases National Epidemiologic Brief: Highly Pathogenic Avian Influenza H5N1 Genotype B3.13 in Dairy Cattle

This report provides field epidemiologic summaries using data collected from epidemiologic questionnaires for H5N1-affected dairy herds. View the report. (2.71 MB)

Previous Updates

DateTitle
8/28/24 CVB Notice 24-13: Field Studies with Nonviable, Non-replicating Veterinary Vaccines Targeting Highly Pathogenic Avian Influenza in Livestock
8/15/24USDA Provides Information on Second Retail Sampling Survey
8/13/24FSIS To Start H5N1 Beef Monitoring Sampling
7/17/24Cow “Challenge” Study Should Help Turn Tables on H5N1 in Dairy Herds 
6/9/24Highly Pathogenic Avian Influenza (H5N1) Epidemiological Multi-State Summary – June 9, 2024
6/8/24Highly Pathogenic Avian Influenza (H5N1) National Epidemiological Brief – June 8, 2024

Genetic Sequencing

USDA makes genetic sequences from the U.S. H5N1 clade 2.3.4.4b influenza virus, including those from samples associated with the dairy cattle event, available on GISAID (the Global Initiative on Sharing Avian Influenza Data) and the National Center for Biotechnology Information (NCBI) Sequence Read Archive (use search term “WGS of H5N1”).

We post this information—first in raw format and then curated as the sequences are interpreted and quality checked in light of epidemiological information—in the interest of public transparency and ensuring the scientific community has access to this information as quickly as possible to encourage disease research and development.