H5 bird flu, a type of avian influenza, has infected dozens of people in the U.S., and spread to seven states and Canada this year.As concern grows over whether it could lead to another pandemic or lockdown,

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.