Ebola has a nasty reputation for the way it damages the body. It's rightfully earned. “At the end stage of the disease, you have small leaks in blood vessels," says UTMB’s Thomas Geisbert. "You end up with essentially no blood pressure. Your body temperature drops and you go into shock." But when you look at the nitty-gritty details of an Ebola infection, a surprising fact surfaces: The virus isn't what ends up killing you. It's your own immune system.