Norovirus Outbreaks Surge on Cruise Ships During Peak Winter Season

A string of gastrointestinal illness outbreaks, including over 300 cases on the Queen Mary 2, highlights the challenges of containing highly contagious viruses at sea.

The Queen Mary 2 cruise ship reported over 300 passengers and 65 crew members experiencing norovirus symptoms during a Caribbean voyage in late December.
Norovirus, a highly contagious virus causing vomiting, diarrhea, and other symptoms, accounted for 13 of 16 cruise ship gastrointestinal outbreaks in 2024, according to CDC data.
Cruise lines, including Cunard, have implemented enhanced cleaning protocols and isolation measures to curb the spread of the virus during outbreaks.
Experts attribute the increase in norovirus cases to seasonal factors and the return of pre-pandemic travel behaviors, with outbreaks often occurring in close-contact environments like cruise ships.
The CDC emphasizes frequent handwashing, surface disinfection, and immediate reporting of symptoms as key prevention strategies for passengers on cruises.