According to Doctors Without Border, Mamadee was diagnosed with Ebola at a treatment center in Foya, Liberia, where only about a third of people have survived.
The 11-year-old boy had to stay in isolation for more than two weeks. And he lost his sister to Ebola during that time.
But he never stopped dancing.
"He jumps, he ducks, he steps to the side, first left, then right, then left ... swings his hips and shakes his arms," Doctors Without Borders writes. "He doesn't stop, and he doesn't get tired. It is difficult to believe, but Mamadee is an Ebola-confirmed patient."
Even with a health worker standing by in a full protective suit (check out the guy on the left at 0:43), Mamadee steals the show. His spirit shines through.