"less than one in one thousand in those nations have contracted the disease. However, that is NOT good news. It simply means that there remains a huge population yet to be infected with nothing standing in the way of their becoming infected."
I, too, was thinking that the outbreak will not continue at the same rate once the population has been "played out." However, at "less than one in one thousand" infected, with your gold mine analogy in mind, we are still very close to the surface; lots of easy pickings still to be had. I respectfully disagree that "Ebola is winding down." On the contrary, in my opinion, it is just getting started.
Ebola is not random. Epidemics tend to act like wildfires, that may destroy an area with little fuel while bypassing a rich fuel area. They also tend to lose a lot of potential infections with local dead ends.
Were Ebola a real threat, by now casualties should be in the tens of millions and it should be all over the world, not just Africa. It would be comparable to the speed and intensity of a flu season.