(Washington, DC) -- The FDA is warning that tainted raw oysters being sold in Oregon could be linked to a norovirus outbreak. The oysters are from British Columbia and were sold to restaurants and retailers in at least thirteen states. Those states are New York, New Jersey, California, Colorado, Florida, Hawaii, Illinois, Massachusetts, Minnesota, Nevada, Oregon, Texas and Washington. Norovirus is highly contagious and often causes stomach flu, producing symptoms such as abdominal pain, diarrhea, nausea and vomiting.