December 23, 2016
(STAT News) – Final test results confirm an experimental Ebola vaccine is highly effective, a major milestone that could help prevent the spread of outbreaks like the one that killed thousands in West Africa. Scientists have struggled to develop an Ebola vaccine over the years, and this is the first one proven to work. Efforts were ramped up after the infectious disease caused a major outbreak, beginning in 2013 in Guinea and spreading to Liberia and Sierra Leone. About 11,300 people died.