Eboli comes from infected animals. How do THEY get it?
Butchering and eating those animals?
Just like AIDS these ignorant and uneducated natives,villagers,tribesmen are the root of this soon to be if not already epidemic.
“How do THEY get it?”
Contact with other animals that have it, same as any other disease carried by animals like rabies.
There are many viruses in animals that don’t make them that sick but are fatal to humans.
They are passing them around like we do.
They carry the virus, are unaffected by it, and are migratory.
This is what made the source hard to identify, that outbreaks were rural, generally associated with eating 'bushmeat' (infected primates) or bats, caves and mine shafts where the bats might shelter.
The pattern wasn't distinct because the bats were continually on the move.