For me, the percentage thing iwas this. If I didn't have the chemo, and the cancer returned..would I live and ultimately die with the question of "what if...what if I had taken it and I was one of those 2%?" Also 2% is either a significant number or it isn't...depends how important the situation is. If you passed a shop with stickers of "Sale Sale...everything is 2% off" you would probably not be impressed. If, however your child attended a large high school with 1000 pupils and a crazy gunman entered and shot and killed 2% of the pupils...that would be 20 children. Suddenly 2% seems inordinately large....especially if your child was one of those 2%. Each of us is different, but for myself, I couldn't live with that uncertainty that I had done all !00% not 98% that I could to prevent a return of this bastard of a disease. We only get one bite of this poisoned apple.