Welcome to Bird Flu Bulletin: Daily H5N1 Update. Today is Wednesday, October 1st, 2025. We’re bringing you the latest developments on the evolving global and domestic avian flu situation.

Top stories in the past 24 hours:

First, the Centers for Disease Control and Prevention has confirmed a total of 70 human cases of H5N1 bird flu in the United States since April 2024. According to the CDC, 41 of these cases were linked to exposure to infected dairy cows, and 24 were associated with poultry farms or culling operations. Most cases are mild, but one death has been confirmed in Louisiana, and health officials stress that the risk to the general public remains low. No human-to-human transmission has been identified yet.

Second, globally, the World Health Organization and national health ministries continue to report sporadic but concerning human cases in Asia and Latin America. The CDC notes that between January 1st and August 4th, 26 human H5N1 infections have been detected worldwide, with 11 fatalities—predominantly in Cambodia, India, and Mexico. All cases outside the U.S. involve people who had direct contact with sick or dead poultry or wild birds, and no significant person-to-person spread has been documented.

Third, ongoing surveillance in U.S. dairy herds and poultry flocks remains a top priority. The USDA reports that nearly 1,000 dairy herds across 17 states have tested positive for H5N1 as of October 2025, with over 90 million domestic birds affected in commercial and backyard flocks since the outbreak began. The USDA has mandated regular testing of milk supplies and animal movement, aiming to quickly curb transmission and reassure consumers that the food supply remains safe.

Changes in case numbers compared to yesterday: No new human cases have been reported in the U.S. today. This marks a continuation of the recent trend, as there have been no U.S. human cases since mid-February, according to CDC data. Internationally, case counts have also been stable in the last 24 hours, but health authorities remain vigilant for any unexpected shifts, especially in regions with ongoing animal outbreaks.

New guidance and official statements: The CDC and USDA are urging farmers, veterinarians, and workers with animal contact to follow strict biosecurity protocols, including the use of personal protective equipment and prompt reporting of any suspected cases. The agencies reiterate that while the risk to the public is low, anyone with direct contact with infected animals should seek medical attention if they develop flu-like symptoms. Consumers are also reminded that pasteurized dairy products remain safe to consume.

Interview snippet: For more insight, we spoke with Dr. Maria Lopez, a member of the CDC’s avian flu response team. “What we’re seeing now is a virus primarily jumping from animals to humans, but not spreading easily between people,” she said. “The key is to prevent further animal outbreaks through testing, vaccination in poultry where appropriate, and by limiting exposure between infected and susceptible animals. This virus can change quickly, so ongoing surveillance is critical.”

Looking ahead: In the next 24 hours, public health officials expect the situation in the U.S. to remain stable, but there is concern that cooler fall temperatures may increase the risk of avian influenza spreading among migratory bird populations, potentially raising exposure risks for poultry and, in rare cases, humans. The CDC is closely monitoring both domestic and global data for any signs of increased transmissibility or severity.

Thank you for tuning in to Bird Flu Bulletin: Daily H5N1 Update. Please come back next week for more updates on this evolving story. This has been a Quiet Please production. For more information, visit quietplease.ai.

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