If your child is going to daycare, I would certainly vaccinize my child. All you need is for a child in the group not to be and for them to bring whooping cough or a different PREVENTABLE disease to the daycare and your child will get it.
If we stop vaccinating, more and more cases of these diseases will start cropping up. The only reason people can get away without vaccinating is that the majority of the population does.
I have three children. My first born received all of the vaccinations. He is above grade level, scores every year in the 99% in standardize testing and plays ice hockey. My middle one is as bright and knows his mathmatical factorials. He is too young to have taken standardize testing. He does have a speech issue but I don't believe that is due to the fact that I had him get his vaccinations.
I have done my research because I was afraid of the possible reactions.
The one thing I did notice is that my boys got mild fevers after the shots. So with my third child, I have spread out the vaccinations farther apart than the doctors reccomend. I just go back to the office and they ask me which ones I would like now. We are caught up at 15 months and she has never cried or fussed or gotten a fever. The nurses are always happy to see us because she does not get a chance to get upset. The one or two shots at a time does not let her have time to fuss.
Could you not immunize and never get any the diseases they cover? Sure. But why take the chance? I know that if my baby got whooping cough because I refused to vaccinate and died, I would never forgive myself. I guess it is all what you can live with and take chances with.
Good luck!