Via The Lancet: Preparation of at-risk west African countries for Ebola. The summary:
The ongoing Ebola epidemic in west Africa is an unprecedented health and humanitarian crisis. So far, more than 20 000 cases have been reported in Guinea, Liberia, and Sierra Leone, and transmission models developed during this epidemic have predicted spread of Ebola into neighbouring west African countries.
These predictions have already been realised in Nigeria and Senegal, but public health authorities in both countries acted swiftly to limit secondary transmission. The experiences in Nigeria and Senegal attest to the effectiveness of conventional epidemiological methods—particularly, case isolation and contact tracing—in containing Ebola outside the three countries with widespread transmission.