One thing we are all forgetting is the all viruses change with mutations with other viruses so the Ebola of today may not be the same Ebola of tomorrow. This is something that happens with the flu viruses every year. Have you even gotten the flu and then weeks of a month latter got it again? That is what happen it mutated with another flu virus.
The Ebola may mutate with a lighter flu virus and become airborne. Viruses are incredible.