Viruses like the Ebola virus and HIV are different and more complex because they attack the immune system and its responses first.
For example, HIV as we all know attacks the immune system itself so that there is no immune system and the victims die from rare cancers or sicknesses that literally can’t be fought off.
Many of the West Africans, poor as they may be, are not starving and probably more healthy than many Americans, yet Ebola is still taking them down.
The Ebola virus actually invades the immune cells that trigger an immune response so that the body doesn’t know it’s there. Once the virus destroys these immune cells it’s entered the rest of the body in which case the immune system really doesn’t know what to do with it or where to go. As the Ebola virus spreads the immune system just goes crazy and other chemicals are released into the blood stream that weaken the vessels and lowers blood pressure. The virus also enters throughout the entire body destroying all tissue. Doctors who have handled Ebola/Marburg victims say the bodies after death continue on in this destruction phase in which the body literally turns jelly-like due to total cell destruction by the virus. That’s why it has such a high fatality rate.