Major Norovirus Outbreak Strikes Princess Cruises Ship
Health officials have confirmed a significant norovirus outbreak aboard Princess Cruises' Star Princess vessel, with more than 150 passengers and crew members reporting illness during a recent voyage. The gastrointestinal outbreak occurred on a seven-night cruise that departed from Fort Lauderdale, Florida, on March 7, with the ship scheduled to return to Port Everglades on Saturday, March 14.
CDC Reports Illness Numbers and Response
According to the Centers for Disease Control and Prevention, 104 passengers out of 4,307 aboard and 49 crew members fell ill during the current voyage. Most individuals experienced severe symptoms including vomiting and diarrhea, which are characteristic of norovirus infections. Princess Cruises stated that sanitation teams had thoroughly disinfected every area of the ship and implemented additional sanitizing measures throughout the journey.
The company emphasized that affected individuals were kept separate to allow them to rest comfortably in private quarters. Meanwhile, the CDC's Vessel Sanitation Program is conducting a comprehensive environmental assessment and outbreak investigation to help control the situation as the Star Princess completes its scheduled itinerary back to Florida.
Understanding Norovirus and Its Spread
Norovirus is an extremely contagious virus that causes stomach flu-like symptoms and is frequently associated with foodborne illness outbreaks. The virus spreads particularly easily in confined environments where people are in close proximity, making cruise ships a common setting for such incidents. It requires only a minuscule amount to infect someone, and infected individuals shed vast quantities of virus particles in their stool and vomit.
Transmission primarily occurs through the fecal-oral route, where virus particles from one person are inadvertently ingested by another. This mode of spread underscores the importance of rigorous hygiene practices in communal settings.
Context of Cruise Ship Outbreaks
The CDC has already reported two gastrointestinal illness outbreaks on cruise ships this year that met the threshold for public notification. In comparison, there were 23 cruise ship outbreaks in 2025, with 17 linked to norovirus, and the virus was responsible for 15 of the 18 total outbreaks in 2024. Despite the high profile of cruise ship incidents, the CDC notes that such outbreaks account for only about 1 percent of all reported norovirus outbreaks nationwide.
Prevention and Response Measures
While it is impossible to completely eliminate the risk of norovirus, individuals can significantly reduce their chances of infection by washing hands thoroughly and frequently, especially before eating, avoiding shared food, drinks, or utensils, limiting contact with communal surfaces, and steering clear of areas where someone has vomited. On cruises, passengers showing symptoms of gastroenteritis should alert medical staff immediately and follow their instructions, which may include temporary cabin confinement to prevent further spread.
