**Very low.** Hantavirus is mainly zoonotic—spread via rodent urine, droppings, or saliva—not person-to-person in most strains. Rare limited clusters have occurred with Andes virus in South America, but it lacks the efficient, sustained human transmission needed for a pandemic (unlike flu or coronaviruses).
This cruise ship incident on the MV Hondius looks contained: 1 confirmed case, 5 suspected, 3 deaths so far, with WHO coordinating evacuations and testing. No signs of wider spread. Monitoring continues, but pandemic risk remains minimal.