CDC’s Vessel Sanitation Program reports an outbreak of acute gastroenteritis due to norovirus aboard the AIDAdiva during a journey from 10 November to 16 December 2025. The number of ill passengers exceeded the reporting threshold, prompting investigation and enhanced control measures.
Eat thoroughly cooked food served hot, avoid raw or undercooked eggs, poultry or meat, and avoid unpasteurised dairy products. Prefer bottled or boiled water and avoid ice of uncertain origin. Travelers who develop vomiting or diarrhoea during or after travel should maintain hydration and seek medical advice if symptoms are severe or prolonged. Factsheet: Diarrhoeal diseases.