“The reality was that, for years, scientists who studied Ebola, which belongs to a family of viruses called filoviruses, had poured their hearts into work to develop vaccines and drugs to combat these deadly scourges. And for years, they had seen promising work smash up against unscaleable walls. There was no potential for drug makers to recoup development costs; and, with outbreaks only sporadic, there was little opportunity to subject experimental vaccines to rigorous tests.” Stat News: The inside story of how scientists across three continents produced an Ebola vaccine.