Apparently there are survivors of the ravages of the Ebola virus. In the world at large, there must also be some natural immunes, whose biological settings are adjusted just enough so the combination of factors that lead to death do not proceed, even though the individual may be subject to fevers and bodily distress before the progress of the disease is arrested.
Our study of the causes and propagation of diseases, while already light-years beyond what it was just fifty years ago, is only now beginning to yield on the more pernicious and aggressive of disease agents. Ebola is like the HIV that progresses to full-blown AIDS, not over a period of several years, but in DAYS, compromising the natural immune systems of the body, and causing massive organ failure once it hits tipping point.
I know this is true. A man I knew when I lived in San Francisco contracted AIDS 26 years ago. Today, he is still perfectly healthy. An anomaly. Turns out his family was from a certain area in Northern Italy that apparently produces people who don't get sick from the AIDS virus.
I have no idea whether he can or would spread it. Don't know him well enough to ask.
One would think that researchers would be very serious about testing people with natural immunity to various killer diseases.