The outbreak of hantavirus on a cruise ship carrying passengers from across the world is a situation that authorities say they are taking incredibly seriously.
Three passengers have died either on board or after travelling on the ship, which set sail from Argentina a month ago.
A huge operation is in place to trace people potentially exposed to the virus who have already taken flights home to numerous countries, including the UK, South Africa, the Netherlands, the US and Switzerland.
Health experts stress the risk to the general public is low.
The BBC’s Health editor Hugh Pym, Martine Croxall and a panel of experts explain what we need to know about the illness.
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