I don't think this is ASB, because we're dealing with a real disease that, and there was risk of it spreading further I think.
Anyway, here's my question, could Ebola, in the 1980s outbreak, have spread to the rest of the world, and have become a global epidemic? Or was it inherently impossible for this to occur?
To broaden the question, could any disease have reached epidemic levels that didn't for luck and/or timely intervention reasons in OTL? Again, global epidemic.