If you want to know the truth, insiders of the Medical field that I have spoken with and one a teacher of mine who used to be a nurse, have told me that years ago they used to reuse needles on the patients and the only method of disinfection was with alchol back then. So the medical field can go on hiding what they did years ago and blame the Hep C's and B's and aids etc.. On drug users etc.. Of course those things would also spread it but think about it, where did it start?