[Name] Gray Death [Source] Deus Ex [Symptoms] 
A global plague engineered using nanotechnology within a Universal Constructor by Majestic-12, the Gray Death virus is actually a hybrid (cyborganic) disease of biological and mechanical structures. It is based on the adverse and ultimately lethal effects of nanotechnology on an unmodified human body. Named the Gray Death because of the gray patches of discolored scar tissue that cover its victims' skins, if and when the disease is cured. Symptoms include the aforementioned discoloration of the skin, coughing, physical pain and death.