A team from the British Broadcasting Corporation has launched an on-site investigation in the southern Argentine city of Ushuaia, working to unpack the origins of a dangerous hantavirus outbreak linked to the Dutch expedition vessel MV Hondius. Located on the edge of Tierra del Fuego, billed as the world’s southernmost city, Ushuaia has emerged as the key suspect in the spread of the virus that has already sickened multiple people who sailed on the vessel.