cdc update jul 5 24

CDC Update

July 5, 2024 – CDC continues to respond to the public health challenge posed by a multistate outbreak of avian influenza A(H5N1) virus, or “H5N1 bird flu,” in dairy cows and other animals in the United States. CDC is working in collaboration with the U.S. Department of Agriculture (USDA), the Food and Drug Administration (FDA), state public health and animal health officials, and other partners using a One Health approach. Four human cases of A(H5) infection associated with this outbreak in U.S. dairy cows have been reported. A The most recent report was on July 3, 2024, and occurred in Colorado. Like the previous three cases (1 Texas, 2 Michigan, 3 Michigan), this person is a dairy worker who had exposure to sick cows. Cumulatively, there have been five human cases of A(H5) in the U.S., the first occurred in Colorado during 2022 in a poultry worker with exposure to sick birds. Based on the information available at this time, CDC’s current H5N1 bird flu human health risk assessment for the U.S. general public remains low. On the animal health side, USDA is reporting that 139 dairy cow herds in 12 U.S. states have confirmed cases of avian influenza A(H5N1) virus infections in dairy cows as the number of infected herds continues to grow.