There are no guarantees of efficacy depending upon another country self-policing in that manner. It has to be controlled on our end. We’re concerned about our own people or certainly should be. You may feel differently.
That's true, given current technology.
But the real solution has to be to defeat the disease in the absolute, be it via effective treatment, vaccines that work, or containment strategies that work.
Let's hope that West Africa is the lab. And remains the lab. Only the lab.