Outbreak details
Cruise line: Aida Cruises
Cruise ship: AIDAdiva
Voyage dates: November 10, 2025–December 16, 2025
Voyage number: DI40251110
Date outbreak reported to VSP: November 30, 2025
Number of passengers who reported being ill during the voyage out of total number of passengers onboard: 95 of 2,007 (4.8%)
Number of crew who reported being ill during the voyage out of total number of crew onboard: 6 of 640 (0.9%)
Predominant symptoms: diarrhea, vomiting
Causative agent: norovirus
In response to the outbreak, Aida Cruises and the crew aboard the ship reported the following actions:
- Increased cleaning and disinfection procedures according to their outbreak prevention and response plan
- Collected stool specimens from gastrointestinal illness cases for testing
- Isolated ill passengers and crew
- Consulted with VSP about sanitation cleaning procedures and reporting ill cases
VSP is remotely monitoring the situation, including review of the ship’s outbreak response and sanitation procedures.
Learn how passengers can protect themselves.
Gastrointestinal (GI) illness is a commonly used term for acute gastroenteritis (AGE). Reporting gastrointestinal illness is important. When passengers and crew tell the medical center onboard about their symptoms, it helps GI illness outbreaks get detected quickly. This allows steps to be taken to limit the spread of illness. Medical staff evaluate symptoms to see if they meet our case definition for AGE:
- Three or more loose stools within a 24-hour period or what is more than normal for that person OR
- Vomiting along with one of the following symptoms: diarrhea, muscle ache, headache, abdominal cramp, or fever
Cruise ships are required to report these cases to us.
Note: Cases reported are totals for the entire voyage. It does not mean all people are sick at the same time, such as when they arrive or leave a port or ship.
Learn more about AGE monitoring and how VSP responds to AGE outbreaks.