Go read this article by Peter at Bayou Renaissance Man.
This is yet another aspect of the biggest problem in Africa: tribal identity and culture. There is no concept whatsoever in African tradition that the individual matters. It's all about the tribe. You are born into a tribe, and that basically circumscribes most of your life. You work for the good of the tribe; you die (if necessary) for the good of the tribe (including older people walking out into the bush to starve if there isn't enough food, so that what's available will keep the youngsters - the future of the tribe - alive); you identify so strongly with your tribe that all others are regarded with, at best, suspicion, if not fear and/or hatred. You work to strengthen your tribe in every way possible, including by weakening all other tribes (this is why so many African civil servants will bend or break all the rules to accommodate their tribe, while applying them rigorously against the interests of others). I could go on, but you get the idea.RTWT.
Then, for deeper background, go read (or re-read) Kim DuToit's classic essay, Let Africa Sink.
The former will give you plenty of insight on the problems in DRC that're going to make this Ebola outbreak far worse and more widespread than the one in W. Africa in 2014.
The latter essay should be mandatory reading (with a post-test and minimum score required) for everyone going to Africa for public or private employment, particularly anyone employed by the State Department, every member of Congress, and any actual or potential recruit to the Do-Gooder Brigade going to the continent, or even thinking about it.
Anyone scoring below 85% on a 50-question exam on that essay should be refused government employment, and denied an exit visa by the State Department.
And that's the perspective of two transplants from Africa to the US who spent years of their lives there.
I also remind you that airfare from Nairobi to Atlanta is currently less than US$800.
The biggest hurdle (and really, the only one) keeping Ebola in Africa most years is the fact that Democratic Republic of Congo is the absolute poorest country in the entire world - actual dead last, not just bottom five - and the average person there makes US$394.25 per year. And for everyone there who makes far more, a lot of people there make far less than that.
So airfare. Nothing else.
That's what's keeping you fat, dumb, and happy.
Sleep tight, America.