No. Oysters and other seafood contain parasites. If not treated in time, the parasites will multiply and increase in number in the intestines, so drugs need to be applied in time to eliminate them. Parasites in oysters include norovirus and Vibrio cholerae. These two parasites are also very harmful to the body. Norovirus can cause gastroenteritis, and Vibrio cholerae can cause colds and fever.