It is not service connected and the "official" government line is that you get it fron drug use, getting tattoos, unprotected sex and oh yeah blood transfusions before 1992. There is a large underground swelling of feeling in this country that it was caused by the air gun shots or as an experimental vaccine to combat regular Hep as the the government knew that that was a major problem in Nam. I know as I've been fighting the VA for 3 years over this. Just another way to kill the Viet Nam army off. xgrunt