After losing most of his family to Ebola, health worker Alexander Kollie (right) is building a new life with son Kollie James, the 1,000th survivor of the disease to be cared for by Doctors Without Borders. Katy Athersuch/Courtesty of Doctors Without Borders hide caption

itoggle caption Katy Athersuch/Courtesty of Doctors Without Borders

A man sits on a bed that will be part a new Ebola treatment center in Monrovia, run by Doctors Without Borders. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

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

Illegal immigrants watch from behind a fence as police patrol the perimeter of a detention center at Amygdaleza, on the northern fringes of Athens, on April 30, 2012. Thanassis Stavrakis/AP hide caption

itoggle caption Thanassis Stavrakis/AP