Health officials have linked at least 30 cases of hepatitis A to a frozen berry and pomegranate mix that’s sold at Costco. The illnesses have so far been reported in California, Oregon, Arizona, Colorado and New Mexico, but authorities are bracing for the outbreak to spread.

The product–called the Townsend Farms Organic Anti-oxidant Blend Frozen Berry Mix–has been pulled from store shelves. Costco is reportedly notifying any of its members who bought the item since late February.