Listeners will no doubt remember the devastating Ebola outbreak of 2014–2016. More than 28,600 people were infected, and 11,325 people died across several countries in West Africa. One of the hardest-hit places was Sierra Leone, where nearly 4,000 people lost their lives. In the years since, scientists and civil society advocates have raced to develop and implement a vaccine to protect against future outbreaks. That vaccine works—and works well. It was tested during outbreaks in the Democ...
