Because it appears that Ebola is mutating so frequently, a vaccine would probably be useless because vaccine production will not be able to be updated and effective against ever changing strains.
I’m also worried about the asymptomatic incubation period and airborne spread.
All viruses mutate. Most of the mutations in Ebola change the genetic material, not the structure, so the vaccines would work just fine.
The problem is in testing a vaccine. Not many people would volunteer to get an experimental vaccine, then get a shot of Ebola virus to see if the vaccine works.