The British national had been on board the cruise ship MV Hondius that is now being evacuated off Tenerife

WHO warns the number of cases could rise due to the long incubation period of the virus, but said the overall public health risk was low

The patient is on the remote Atlantic island of Tristan da Cunha, which was visited by the cruise ship in April.

The British passengers will have to self-isolate for 45 days

Some 22 British passengers and crew on board the MV Hondius ship are expected to reach Tenerife