Hi, My son is 3 month old. His first vaccination for DTP, OPV and HIB is done previously (painfull). Now another vaccination for DTP2, OPV2, & HIB2 is pending for him. Can I go ahead with painless vaccination second time. Because in vaccination he feel pain, swelling and fever for two days. Now I want painless vaccination for him. Can please suggest and please provide name of these painless vaccination. Thanks. Regards, Arun