There are a few vaccines that work in animals, they just haven't been funded to go through the trials needed to be widely used in humans. There is a good interview on Montana public radio with one of the leading researchers that touches on this:
(Rocky Mountain Lab in Montana is where a large portion of the ebola research in the nation if not world the world happens and mtpr had gotten some really good interviews as a result.)
http://mtpr.org/post/getting-closer-ebola-vaccine
(Rocky Mountain Lab in Montana is where a large portion of the ebola research in the nation if not world the world happens and mtpr had gotten some really good interviews as a result.)