The epidemic began at the end of 2013, in Guinea. From there it spread to Liberia, Sierra Leone, Nigeria and Senegal. Many of the affected countries face enormous challenges in stopping its spread and providing care for all patients.
Thousands of people have died and many are at risk as the fatality rate from this virus is very high. As the crisis worsens, as well as the enormous health challenges involved, the social and economic consequences may set these countries back, reversing some gains a number of these countries have made in recent years.