My soon to be 6 year old ds has been immunized according to the "schedule" up until now. HE is due for his fifth DPT, fourth Polio and second MMR. If he has never had a major reaction before and all the vaccines are thimerosol (sp) free, do you know if he would get a reaction now? I had decided to wait on these this fall because I am so unsure still, but just received the school letter saying he needs them. I know I can possibly get a state exemption, but still would like to know about possible reactions, if he has never had one before. THANKYOU FOR ANY RESPONSES!!!!!!