Did you know Sgt. Johnson was originally scripted for the ORION Project (Spartan I) but was only left with Borens Syndrome. Borens Syndrome was a cover for ORION . I say "only" because it was only one of the side effects that were suppose to enhance the human soldier. This is also why Sgt. Johnson cannot get infected by the flood, his immune system is far too greater than that of the Flood.