Hantavirus on cruise ships: what travelers should know

Until 2026, hantavirus was rarely associated with cruise travel. The multi-country cluster reported by WHO in May 2026 — linked to a Dutch-flagged ship that departed Ushuaia, Argentina, and visited remote South Atlantic islands — changed that perception. The investigation is ongoing and the source remains under study. What raises risk on cruise itineraries: - Stops in ecologically sensitive areas with rodent populations (sub-Antarctic islands, remote ports). - Shore excursions that involve enclosed buildings such as research stations or abandoned shelters. - Camping, hiking through tall grass, or contact with cabins not used for months. Reasonable precautions for travelers: - Avoid entering closed or rarely-used buildings on remote islands. If you must, ventilate first. - Do not handle rodents, dead animals, or droppings during shore excursions. - Wash hands after any nature contact and before meals. - Report any flu-like symptoms with respiratory distress within 8 weeks of an unusual exposure to onboard medical staff. For operators: - Review pest-control protocols on stored gear and luggage compartments. - Train medical staff on hantavirus recognition. - Coordinate with port authorities on rodent surveillance, especially in remote stops. WHO maintains the global risk for hantavirus from cruise travel as low. The 2026 cluster is exceptional and linked to a specific itinerary; routine cruises in major ports do not pose hantavirus risk.