The sample was discovered at a retail outlet in Santa Clara County, according to the California Department of Public Health. The county has been testing raw milk from stores as a second line of consumer protection against the avian flu, which has spread across the state in poultry, dairy cows and humans.

I almost killed my son when I made the decision to give him raw milk,”  said Mary McGonigle-Martin of Murrieta.

State health officials warned consumers Sunday after detecting bird flu virus in a retail sample of raw milk from a dairy in Fresno.