Excerpts from Books and Wikipedia
"In July 2019, the World Health Organization declared the Congo Ebola outbreak a world health emergency. . . . An Ebola vaccine, rVSV-ZEBOV, was approved in the United States in December 2019. It appears to be fully effective ten days after being given. It was studied in Guinea between 2014 and 2016.[9] More than 100,000 people have been vaccinated against Ebola as of 2019." [Wikipedia]