If you want to get scared, read up on prion diseases. In humans, it is called Creutzfeldt-Jakob disease. Also known as mad cow disease, chronic wasting disease in animals. Prions are extremely difficult to destroy.
Prions have all the makings for a nightmare horror story, but strangely, prion talk is hushed up. Laws have very quietly been enacted where hunters cannot bring the brains and spinal cords from their kills into California. Being extremely difficult to destroy, yes patients have been infected in surgery with it. If Creutzfeldt-Jakob disease is suspected, surgical instruments are destroyed, and tissue samples are sent to a special lab for confirmation and disposal. Because they are difficult to destroy, prions can survive in the environment to infect new hosts that come along (which is probably how it spreads in the wildlife population).
Getting back on the ebola topic, it has been years since my doctors' offices have asked if I have recently traveled outside the country....