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How did hantavirus get on a cruise ship?

Hantavirus can be introduced onto cruise ships when infected rodents gain access, often by traveling unnoticed in cargo, food shipments, or while the vessel is docked. Once onboard, these animals may contaminate enclosed areas such as storage rooms or lower decks. The virus can then be transmitted if tiny particles from rodent droppings, urine, or saliva become airborne, particularly when contaminated materials are disturbed, allowing them to be inhaled.