I wonder how easy those ambulances are to decontaminate? Plastic sheets not withstanding. I’m guessing lots of stuff back there.
If this Ebola gets out of hand, I think a pickup truck with a fiberglass canopy, a foam mat on the floor may be a better way to carry infected people around. Throw the mat out and hose the bed down with bleach after each run. Or - I suppose just keep designated “Ebola” ambulances and only use them for confirmed cases.