I wonder if there are any genetic factors that determine resistance? In the US, Duncan and this fellow were West Africans. The Americans with Ebola treated in the US all survived. One nurse (Vinson) is an AA but she was mixed race.
c 2005. The Bubonic plague was really (for the most part away from the coasts) a hemorrhagic virus, that never made it to Africa. There is little if any resistance in a population that has not seen the disease. Look at Smallpox in the American Indian population. So the answer is: Yes, there is a genetic influence.
Dark-skinned people commonly have significant vitamin D deficiency. Vitamin D aids the body's immune system in fighting off disease. It would be interesting to examine the races of the hundreds of medical personnel who have contracted Ebola in west Africa and compare the respective mortality rates of Caucasians versus Negroes. If such a study shows much higher mortality rates for Negroes, that doesn't suggest that Ebola is racist, but it certainly might lead WHO to recommend massive vitamin D supplements for anyone, white or black but most particularly the latter, if they are working in the effort to control this plague.