Note: the other diseases here other people figured out. Learing from their methods I figured this one out by myself in the fall of 2014 - RJS)
Observatiions of the selenovirus EBOV family pertaining to the 2104 outbreak in West Africa
Filoviruses, which include HIV and Ebov encode for a human homologue of the lipid peroxidase protectant glutathione peroxidase ("GPx3") which is implicated in at least 18 places in the immune system.
To manufacture this requires the use of a selenium containing catalyst - selenocysteine. Thus the virus which also encodes for a very similar chemical to GPx3 strips the body of selenium. In HIV this takes a decade and explains AIDS. Ebola can do it in a day.
If you supplement with Se the virus and your immune system both have enough, you don't get sick in fact you don't even get the sniffles and the immune system kills it and you never knew you were sick. That is it acts like the Reston strain from the Philippines that is not harmful. Only the African selenium containing versions are highly pathogenic. This has to be what keeps the Baku people in Gabon alive.
We found this out because there's a tribe in Gabon, the Baku, that have a natural immunity to the disease because they live in the coastal forest and eat Gabon nuts, the African equivalent of the Brazil nut and these contain more selenium than any food known.
One Brazil nut a day will prevent Ebola. Two will cure it.