CNN —Whether from Miami, New York, Seattle or more, millions of Americans pack aboard cruise ships on vacation. That’s the highest number of norovirus outbreaks on cruises recorded since 2012, with almost half of the calendar year left to go. Still, to prevent the spread of norovirus, Schaffner recommends that cruise passengers take extra precautions and wash their hands thoroughly with soap and warm water. According to data from the CDC’s Vessel Sanitation Program, the number of norovirus outbreaks on cruise ships docking at U.S. ports had years of steady decline after 2015. Overall rates of acute gastroenteritis on cruise ships in the U.S. also decreased from 2006 to 2019.

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