H5N1 Outbreak Stabilizes in UK and California Dairy Farms Amid Continued Surveillance and Low Human Transmission Risk

Bird Flu Bulletin: Daily H5N1 Update Friday, October 31, 2025 This is the Bird Flu Bulletin, your daily three-minute news update on the global H5N1 avian influenza situation. It’s Friday, October 31, 2025. Here are today’s top developments. Top stories First, the UK saw no new cases reported in the last 24 hours, keeping the current outbreak season’s count at 12 confirmed H5N1 cases – 10 in England, one in Wales, and one in Northern Ireland, while Scotland remains free of cases so far. This marks a steady period after the season’s initial surge, according to the UK Department for Environment, Food & Rural Affairs. Second, the situation in California’s dairy sector remains under scrutiny. The California Department of Food and Agriculture confirmed that in the past 30 days, 11 dairy farms have tested positive for H5N1. As of today, 749 dairies have been affected since the first detection, with 373 now fully recovered and released from quarantine. State authorities continue to enforce bi-monthly surveillance of released dairies to monitor and contain any resurgence. Third, the Centers for Disease Control and Prevention reports that human cases in the US are holding steady compared to yesterday. Nationwide, there have been 70 confirmed or probable human H5N1 cases since early 2024, with no new cases reported in the last 24 hours. California leads with 38 human infections, primarily linked to exposure in dairy herds. Health officials emphasize that the risk to the general public remains low but advise vigilance, particularly among those working with livestock. Case numbers Compared to yesterday, global and national tallies have not changed significantly. Authorities in both the UK and the US report no new animal or human cases today. Surveillance continues intensively in high-risk zones, with active screening and rapid response protocols maintained, particularly in affected agricultural regions. New guidance and statements California’s Department of Public Health reinforced its directive for workers in contact with infected animals to use full personal protective equipment, including N95 masks, gloves, and face shields, to minimize transmission risk. The CDC also reissued its call for poultry workers and dairy farm staff to promptly report respiratory symptoms and seek testing when appropriate. Brief interview snippet We spoke with Dr. Linda Torres, infectious disease specialist at the University of California, Davis, who commented: “While we’re encouraged by the current lull in new reports, the H5N1 virus remains a moving target. Continuous monitoring is crucial, as seasonal migration among wild birds can introduce new strains. The risk of spillover to humans or other species requires that we remain vigilant, especially as winter approaches and more birds intermingle with livestock.” Looking ahead Tomorrow, health authorities in the Americas and Europe are expected to publish weekly summary updates. In California, newly recovered dair This content was created in partnership and with the help of Artificial Intelligence AI.