The results are exciting because there aren't any fully proven Ebola immunizations or treatments. Hopefully, some will be ready by 2015. But there's still plenty of work left to do. Because the vaccine they tested is so new, Ledgerwood and her team gave test subjects low-potency doses of it. The dose was not enough to give the volunteers long-lasting protection against Ebola, and about half of the test subjects who received the vaccine didn't get any protection at all. However, the fact that the low-potency vaccine gave about half of people short-term protection, while triggering few side effects, is good news.