As The Guardian has noted, drugs and vaccines for Ebola has typically been low priority for the main drugs companies although now there is a new focus and sense of urgency:
Until now, pharmaceutical firms have given Ebola very low priority. The few potential drugs and vaccines under development are now being sped into trials. Healthy volunteers in the UK and US have been injected with a candidate vaccine to test safety. Drug trials will soon be set up in west Africa, but they are several months away and there is no certainty that they will work.