MSF health workers prepare at ELWA’s isolation camp during the visit of Senior U.N. System Coordinator for Ebola David Nabarro, at the camp in Monrovia

Medicins Sans Frontieres (MSF) health workers prepare at ELWA’s isolation camp during the visit of Senior United Nations (U.N.) System Coordinator for Ebola David Nabarro, at the camp in Monrovia August 23, 2014. REUTERS/2Tango