When we read the title of this document it sounded like something out of Star Wars, or maybe Star Trek. It sounded as though it was going to discuss force fields and high energy weapons. We could not have been more wrong. This very interesting document actually talks about the harm that we may cause or encounter of a biological nature. It certainly makes sense. We as humans have a history of infecting people with no resistance, as in the discovery of Hawaii for example, sailors visited and natives were sickened or died. Even the War of the Worlds ended with invaders being repelled by their lack of resistance to the invisible menace we know as a virus. This eye-opening document discusses “forward” and “backward contamination” and you can find it HERE.