Health officials in the United States say a norovirus outbreak linked to raw British Columbia oysters has spread to at least 13 states.
A statement posted by the Centers for Disease Control and Prevention says at least 91 illnesses are related to consumption of the potentially contaminated oysters.
States reporting norovirus cases range from Washington, Oregon, California and Hawaii east to New York and Florida.
The CDC and U.S. Food and Drug Administration say they are still trying to determine the extent of the distribution and the size of the outbreak.
The Public Health Agency of Canada says the shellfish,
