A picture taken on July 24, 2014 shows a staff member of the Christian charity Samaritan's Purse spraying product as he treats the premises outside the ELWA hospital in the Liberian capital Monrovia. An American doctor battling West Africa's Ebola epidemic has himself fallen sick with the disease in Liberia, Samaritan's Purse said on July 27. AFP PHOTO / ZOOM DOSSO (Photo credit should read ZOOM DOSSO/AFP/Getty Images)
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AFP ZOOM DOSSO