On a Sunday in July 2014, a man boarded a plane in Monrovia, Liberia, and flew to Lagos, Nigeria. He felt sick with a fever when the trip began and was in worse shape by the time he landed. The Nigerian authorities took him to a hospital, where doctors eventually diagnosed Ebola.
From that first patient, infections soon began to spread in Lagos, which is Africa’s most densely populated city. It was the most terrifying period during any Ebola outbreak, Dr. Thomas Frieden, the former head of the Centers for Disease Control and Prevention, has said.
But two months later, the crisis was over. Nigeria had no more Ebola cases, and fewer than 10 people, including the man from Liberia, had died. How did Nigeria prevent an epidemic? It wasn’t science, or at least not science as people typically define it. It was more basic than that.