JOHANNESBURG, May 6 (Reuters) - A luxury cruise ship hit by a deadly hantavirus outbreak and marooned for days off the coast of Cape Verde with close to 150 people on board was due to head to Spain, while South Africa confirmed it identified among the victims a strain of the virus that can - in rare cases - spread among humans.

And the Swiss government said a man who returned to Switzerland after being a passenger on the MV Hondius was infected with the hantavirus and was being treated in Zurich. It said there was no danger to the broader population.

A Dutch couple and a German national who had been on the ship have died, while a British national is in intensive care in South Africa. The Netherlands is preparing to evacuate three patients who are on board.

Since the start of the outbreak, the World Health Organization has stressed that the risk to the broader public is low.

HUMAN-TO-HUMAN TRANSMISSION IS RARE