Cruise ships sailing in U.S. waters reporting GI illness cases to the Center for Disease Control’s Vessel Sanitation Program is at its highest rate since 2010 through the first four months of the calendar year.

Cruise ships are required to report GI illnesses when levels reach three percent or more of passengers and crew reporting symptoms.

Information and reports concerning outbreaks are posted by the CDC to its website and are viewable to the public.

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