Before 2014, Ebola was a disease that was mostly confined to remote African villages. Health officials didnt worry about it going global. Ebola first appeared in 1976 during twin outbreaks. By the time Ebola outbreak was identified in March, it had already spread to all three countries along the border. Nine countries hit with ebola in one year. There's never been an Ebola outbreak like this before.

Is there a vaccine for Ebola?

Health workers in Mali have been given an experimental vaccine against Ebola designed to boost the immunity of those on the frontline of the battle against the disease, which has so far claimed more than 3,800 lives in west Africa.
Mali has no Ebola cases but it borders Guinea, where the outbreak began. The trials are taking place to determine whether the potential vaccine is safe and that it does at least have some sort of protective effect.