I found that out several years ago when I tried to donate blood for my co-workers newborn. I was the only match in the lab I worked at and they wanted someone they knew. I was denied because of my surgery less than a year prior to donating. They said I may have received blood during the surgery without my knowledge. The tattoo thing is due to hepatitis and other blood born diseases that could present themselves at a later time.

I am sitting here pondering this whole mj thing now. Jim smokes to relieve his clonus. It's sad when a person chooses a drug that works better than a major narcotic, yet will be refused life because it's illegal. I wonder if methadone or any legal drugs are a deciding factor as well? If not, what makes those class of drugs Ok and mj not? I guess I better start my research.