MONROVIA, LIBERIA - AUGUST 15: A Liberian health worker disinfects a corpse after the man died in a classroom now used as Ebola isolation ward on August 15, 2014 in Monrovia, Liberia. People suspected of contracting the Ebola virus are being sent by health workers to the center, a closed primary school originally built by USAID. The Ebola epidemic has killed more than 1,000 people in four West African countries. (Photo by John Moore/Getty Images)

MONROVIA, LIBERIA - AUGUST 15:  A Liberian health worker disinfects a corpse after the man died in a classroom now used as Ebola isolation ward on August 15, 2014 in Monrovia, Liberia. People suspected of contracting the Ebola virus are being sent by health workers to the center, a closed primary school originally built by USAID. The Ebola epidemic has killed more than 1,000 people in four West African countries.  (Photo by John Moore/Getty Images)