Ebola treatment centres

An American doctor who was exposed to the Ebola virus in Sierra Leone has been admitted Sunday to a clinic outside Washington as a precautionary measure. He had been volunteering as a physician in a unit treating those suffering from the tropical fever that has already killed more than 3,000 people in west Africa since the end of last year. Despite being trained in strict infection control practices, medical staff in the region are at constant risk of infection.VIDEOGRAPHIC