The World Health Organization (WHO) confirmed that a new experimental vaccine proved 100% effective against Ebola based on preliminary results. In a large study the organization conducted in Guinea, where Ebola is still at large, not a single vaccinated individual developed the disease.
The largest and most complex Ebola outbreak in the history has killed more than 11,000 people and sickened more than 15,000 others so far, according to the CDC. Most of the deaths happened in Sierra Leone, Liberia and Guinea.
Concise overview over the current situation.