VSV-EBOV underwent a trial in Guinea between April 1 and July 20 of this year.
The vaccine had a 100 percent success rate in preventing new Ebola cases.
Once it was determined a person had Ebola, the researchers vaccinated a "ring" of family and friends close to the diseased person. Some were vaccinated immediately, while others received delayed vaccinations. (Video via World Health Organization)
None of the patients who were vaccinated immediately contracted the virus. Of the group who received delayed vaccinations, 16 contracted Ebola.
The trial will now expand its patient criteria to children ages 13 to 17. It'll also be given immediately to all of the patients, rather than having a separate group receiving a delayed vaccination. (Video via Doctors Without Borders)
Since its outbreak early last year, Ebola has killed more than 11,000 people in Sierra Leone, Liberia and Guinea — the three countries hit hardest by the disease. (Video via World Health Organization)