The Ebola virus infection is systemic, meaning that it attacks every organ and tissue of the human body except the bones and skeletal muscles. Ebola HF is marked by blood clotting and hemorrhaging. Although it is not known exactly how the virus particles attack cells, it is postulated that one factor that allows them to do so is that they release proteins that dampen down the immune system response.
The Ebola virus attacks connective tissue multiplying rapidly in collagen. Collagen is the tissue that helps to keep the organs in place. The tissue is basically digested by this virus.
The virus causes small blood clots to form in the bloodstream of the patient; the blood thickens and the blood flow slows down. Blood clots get stuck into blood vessels forming red spots on the patient skin. These grow in size as the disease progress. Also, blood clots does not allow a proper blood supply to many organs such as the liver, brain, lungs, kidneys, intestines, breast tissue, testicles, etc.
Spontaneous bleeding then occurs from body orifices and gaps in the skin, such as needle puncture marks and rips that can suddenly appear. Death is caused by huge loss of blood, renal failure, or shock.