Gov. Newsom declared a state of emergency as the virus continues to infect dairy herds across the country — including more than 600 in California.

The Food and Drug Administration (FDA) has begun collecting and testing samples of aged, raw cow’s milk cheese for the presence of Highly Pathogenic Avian Influenza (H5N1), better known as bird flu, Food Safety News reported.

Collection and testing of raw milk cheese will be done by the FDA amid outbreaks of the illness in several states.

The FDA is testing cheese in response to a bird flu outbreak in several states that is impacting poultry, dairy cows and people across the U.S.