British Army medics have parachuted onto the remote South Atlantic territory of Tristan da Cunha, where one of the 221 residents has a suspected case of hantavirus.

The patient was a passenger on the MV Hondius and disembarked last month.

The U.K. defense ministry says a team of six paratroopers and two medical clinicians jumped Saturday from a Royal Air Force transport plane, which also dropped oxygen and medical equipment.

Tristan da Cunha is Britain’s most remote inhabited overseas territory 2,400 kilometers from the nearest inhabited island, St. Helena.

The group of volcanic islands has no airstrip and is usually accessible only by boat on a six-day voyage from Cape Town, South Africa.