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Norovirus Sickens 115 on Caribbean Princess as CDC Opens On-Board Probe

The CDC’s Vessel Sanitation Program is conducting an environmental assessment to find the source and limit further spread.

Overview

  • - The ship, which reported the outbreak to the CDC on Thursday, has 102 passengers and 13 crew with vomiting and diarrhea consistent with norovirus.
  • - Princess Cruises says it stepped up cleaning, isolated sick guests and crew, and plans a full disinfection when the vessel reaches Port Canaveral on May 11.
  • - CDC investigators from the Vessel Sanitation Program are on board conducting an environmental assessment and an outbreak investigation to curb transmission.
  • - The case count sits just above the CDC’s roughly 3% threshold that triggers a public outbreak notice for cruise voyages.
  • - This is the fourth gastrointestinal outbreak on U.S.-tracked cruises in 2026, with experts noting cruise clusters are a small share of overall norovirus cases but spread easily in close quarters.