Harrison Sakilla, a 39-year-old former teacher, can't stop smiling.
"I have to smile," he says. "I'm the first survivor for the case management center here from Ebola."
Former patients like Sakilla, who've recovered from the virus, lift the collective spirit at at the Doctors Without Borders Ebola center in Liberia's northern town of Foya. He was admitted to the high-risk isolation unit, which is part of a cluster of large tents that make up the bulk of the center.