Morris Nyumah wanted to help his country fight Ebola, so he signed up to work as a hygienist at the Doctors Without Borders care center in Lofa County. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Dr. Joanne Liu (left), international president of Doctors Without Borders poses with a member of the MSF medical team at the organization's Ebola treatment center in Kailahun, Sierra Leone. P.K. Lee/Courtesy of Doctors Without Border hide caption

itoggle caption P.K. Lee/Courtesy of Doctors Without Border

Health workers at the Doctors Without Borders facility in Kailahun wear protective clothing when treating Ebola patients. Carl De Souza/AFP/Getty Images hide caption

itoggle caption Carl De Souza/AFP/Getty Images

Protective gear runs from goggles and head covering to gloves and boots. This health worker was photographed leaving the isolation area at the treatment center in Kailahun, Sierra Leone. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Testing for Ebola, a scientist in a mobile lab at Gueckedou, Guinea, separates blood cells from plasma cells to isolate the virus's genetic sequence. Misha Hussain/Reuters /Landov hide caption

itoggle caption Misha Hussain/Reuters /Landov

Rose Komano, 18 and the mother of three, was the first Ebola patient to overcome the virus in southeastern Guinea, the epicenter of the outbreak. On April 3, she posed at a health clinic in the Gueckedou region. Misha Hussain /Reuters /Landov hide caption

itoggle caption Misha Hussain /Reuters /Landov