The Ebola outbreak in Nigeria appears to be contained, health officials said Tuesday. The U.S. Centers for Disease Control and Prevention (CDC) said that due to a very rapid local and international response, the country may have fully contained its Ebola outbreak. The 21-day incubation period for the disease has passed. Nigeria saw its first confirmed case of Ebola on July 17 when a Liberian-American man collapsed at a Nigerian airport after traveling from Liberia.