Speed. That's key to ending the Ebola epidemic, says the director of the U.S. Centers for Disease Control and Prevention.
Dr. Thomas Frieden is visiting West Africa this week to figure out how to reduce the time it takes to find new Ebola cases and isolate them.
Otherwise, Ebola could become a permanent disease in West Africa.
"That's exactly the risk we face now. That Ebola will simmer along, become endemic and be a problem for Africa and the world, for years to come," Frieden tells NPR. "That is what I fear most."