Norovirus outbreaks spiked on cruise ships this year, with data showing more outbreaks happened between January and June than over the course of any other full calendar year in the last decade. Thirteen norovirus outbreaks have been reported on cruises so far in 2023, according to the U.S. Centers for Disease Control and Prevention, which keeps a record of annual case counts dating back to 1994.
The most recent outbreak hit passengers and crew members on board a Viking Cruises trip from Iceland that docked in New York on June 20. More than 13% of passengers on the Viking Neptune — 110 of 838 in total — reported being ill while onboard, according to the CDC. Nine crew members reported being ill as well. Health officials at the CDC determined that norovirus caused the outbreak after Viking Cruises collected and sent specimens to the agency’s laboratory for testing.
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