Health,
1.)You are wrong. It wasn’t only in “certain populations” it was first clinically diagnosed in “certain populations” but it had been circulating in the general population for anywhere from 10-30 years before it was even noticed in those populations. The first victims of it in the USA (way before the 80s) were a diverse group.
2.) My point is simply that if Ebola isn’t controlled in Africa and we just attempt to lock out that entire part of the world it is virtually guaranteed that the virus will get here somehow. Expecting the whole world to want to follow (or even be able to have secure enough borders to follow if they wanted to do so)is far from being realistic.