An American and a French national who were evacuated from a cruise ship hit by a hantavirus outbreak have tested positive for the virus after returning to their home countries. Seventeen Americans from the ship arrived in Nebraska on Monday and are being quarantined and monitored, with health officials saying the public risk from cases among repatriated passengers is very low. The outbreak aboard the MV Hondius represents an unusual public health incident, though hantavirus transmission between people is rare and typically occurs through contact with infected rodent droppings.