British crew member in need of urgent medical care amid suspected hantavirus outbreak on cruise ship WHO says seven confirmed or suspected cases of hantavirus on MV Hondius, including three passengers who died What is hantavirus, the infection thought to have killed three on cruise ship? A British crew member was in need of urgent medical care and a passenger from the UK remained in a critical but stable condition following a suspected outbreak of hantavirus on a luxury cruise ship in the Atlantic Ocean. Three people have died and medics on Monday were scrambling to evacuate two others from the MV Hondius, which set off in March from southern Argentina carrying 149 people from 23 countries.