Rodent-carried disease is not usually contagious between humans and outbreaks are rare. ‘New world’ variants are the most deadly. What are the symptoms and treatment?

Three passengers on a cruise ship in the Atlantic Ocean have died after a suspected hantavirus outbreak, according to the World Health Organization (WHO).

The outbreak was reported on the polar cruise ship MV Hondius, which was travelling between Argentina and Cape Verde.

The WHO said at least one case of hantavirus had been confirmed, with one patient in intensive care in a South African hospital. Two of those who died were a couple from the Netherlands.

What is hantavirus, the rare virus suspected to have caused the cruise ship outbreak?