It could be that its such an efficient killer that it doesn’t allow for survival of the fittest to allow those most resistant to reproduce.
I dunno, where have you been? I have not seen you in a while?
Oh, I just got over this case of Ebola, but I'm fine now.
Nah, I'm kinda busy and I'm going away for a while so don't call me, OK?.
But the point you make is an interesting one! Of Ebola survivors, has immunity been passed on to their offspring(if they could still reproduce after surviving Ebola).