Thank you to all who responded. You all made me feel better knowing that I am not the only one out there with this problem. I have made an appointment to see my MD again, I can't get ahold of her without and appointment it seems. I am going to ask her what she thinks I need to do. I am thinking about getting the booster and see if that works, and then I'll go from there I suppose. She said earlier to find out what my school requires me to do. That is all great, but I am more concerned about getting the protection I need but if my body won't make the antibodies after the booster and or the series again I'll just have to deal with it! Thanks again to everyone who took the time to respond, I appreciate it and I'll keep you posted. Amy L.