Ebola discoverer: 'This is unprecedented'

Staff of the 'Doctors without Borders' ('Medecin sans frontieres') medical aid organisation carry the body of a person killed by viral haemorrhagic fever, at a center for victims of the Ebola virus in Guekedou, on April 1, 2014.
Staff of the 'Doctors without Borders' ('Medecin sans frontieres') medical aid organisation carry the body of a person killed by viral haemorrhagic fever, at a center for victims of the Ebola virus in Guekedou, on April 1, 2014.

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    Ebola discoverer: 'This is unprecedented'

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CNN's Christiane Amanpour speaks with Dr. Peter Piot about an "out of control" Ebola epidemic in West Africa.