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Illustration of a hantavirus, a rodent-borne virus that causes flu-like symptoms that eventually cause the lungs to fill with fluid, making breathing difficult. [AFP]

Three people have died after a suspected outbreak of hantavirus on board a cruise ship sailing between Argentina and Cape Verde.

So far, one case of the potentially deadly virus has been confirmed, according to the World Health Organization, which stressed that the risk to the public remains low.

However, the suspected outbreak has raised questions over whether the virus, which is normally spread by contact with rodents, is being transmitted between humans.