Norovirus continues to pose significant challenges in the cruise industry, exhibiting its typical resilience and highly contagious nature. This year, outbreaks of gastrointestinal illnesses linked to norovirus have surged, surpassing pre-pandemic levels. According to the Centers for Disease Control and Prevention (CDC), there have been 16 recorded outbreaks as of April 28, 2025, with 10 of these attributed specifically to norovirus. A new dominant strain is suspected to be behind the uptick in infections, as highlighted by Open Jaw.
In recent weeks, cruise lines such as Holland America Line have reported multiple incidents of gastrointestinal illness aboard their ships, notably the Eurodam and Zuiderdam. On the Eurodam, 64 passengers alongside 12 crew members experienced symptoms consistent with norovirus infection, prompting increased sanitation measures aboard the ship.
Gastrointestinal Illnesses on Cruise Ships
The situation is no different aboard the Zuiderdam, where over 50 guests and 14 crew members reported similar symptoms. As these ships continue their planned itineraries, they have implemented enhanced health protocols aimed at curbing the spread of illness amongst passengers and crew alike. This includes frequent sanitization and rigorous disinfection processes.
Response Measures and Health Protocols
Moreover, on board the National Geographic Sea Lion, operated by Lindblad Expeditions, a small number of guests and a crew member developed fever, vomiting, and diarrhea. The specific microbial cause of this outbreak has yet to be identified, emphasizing the unpredictability of such illnesses.
In light of these recent outbreaks, all affected cruise vessels have adopted strict sanitation measures and isolation protocols for those exhibiting symptoms. These efforts are paramount as the cruise industry seeks to maintain public confidence and avert a recurrence of the negative media attention it experienced during the Covid-19 pandemic.
To learn more about the ongoing health concerns related to cruise ships and norovirus outbreaks, visit the CDC’s dedicated page on cruise ship outbreaks.
