In November-December 2024, the County of Santa Clara Public Health Department detected influenza A and A(H5) virus in unpasteurized milk sold in the county. A(H5N1) virus surveillance of off-the-shelf unpasteurized milk led to early detection and recall of potentially infectious products that prompted state agencies' verification and subsequent regulatory action.
Keywords: H5N1; avian influenza; surveillance; unpasteurized milk.
Published by Oxford University Press on behalf of Infectious Diseases Society of America 2025.