Comal County has reported multiple cases of avian influenza H5N1 or bird flu found in vultures in Landa Park, the county's first cases of 2025.

The report is the latest evidence that the outbreak in dairy herds is spreading undetected in cows, and the spillover into people at highest risk of exposure is going unnoticed.

Out of 150 participating veterinary practitioners across the country, three had antibodies indicating recent infection with Type A H5N1 bird flu, based on blood samples collected in September 2024, noted Samantha Olson, MPH, of the CDC's National Center for Immunization and Respiratory Diseases, and colleagues.