A female sanitation worker wears standard gear for a Doctors Without Borders Ebola center. The outfit includes rubber boots, goggles, a face mask, a hood, three layers of gloves, a Tyvek suit and thick rubber apron. No exposed skin is allowed. She was photographed in Monrovia, Liberia. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

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