An American passenger evacuated from the hantavirus-infected MV Hondius cruise ship in the Canary Islands tested positive for hantavirus but shows no symptoms, according to U.S. health officials. The ship docked in Tenerife on May 10 after an outbreak that killed at least three people and infected several others. The positive case is among 17 Americans airlifted home, and at least one other passenger (French national) developed symptoms during evacuation — highlighting that asymptomatic carriers can still be infectious in close quarters during transport.