ELWA Hospital in Monrovia

ELWA Hospital in Monrovia

Zoom Dosso/AFP via Getty Images

Staff of Samaritan's Purse put on protective gear before entering a treatment room at the ELWA hospital in Monrovia, Liberia on July 24, 2014. An American doctor battling West Africa's Ebola epidemic fell sick with the disease in Liberia, Samaritan's Purse said on July 27.