There’s always the discussion that Ebola burns out quickly - it incapacitates victims so suddenly and well that it can’t spread.
Incubation is 2-21 days.
However … it has all sorts of infectious tricks up its sleeve. Bodily fluids, obviously, which in my uneducated way I take to also mean aerosal transmission from coughing. Vomiting and diarrhoea spread it, which is a massive issue if a child gets it and is in a communal setting.
It could do better, but I think it’s bad enough that if it comes to my town, I’m heading out of town.
The WHO’s message is basically quarantine, quarantine, quarantine.
That’s why everyone’s a little concerned about it getting into a large city.