The new vaccine has shown 100 percent success in trials and will likely bring an end to the West African epidemic.
"This is an extremely promising development. If proven effective, this is going to be a game changer," WHO Director Margaret Chan said, as cited by Xinhua.
Ebola has killed over 11,200 people in West Africa since the outbreak was first declared more than a year ago. Liberian officials announced in May they were "in control of the outbreak."
The virus spreads through direct contact with blood or other bodily fluids of infected people. The disease has a high risk of death, killing between 25 and 90 percent of infected people.