You need to be very pro-active if you are thinking of not immunizing your child. Most parents who are not into immunization criticize other parents who do choose to immunize their children as being "brainwashed" by the medical community, and accepting any old thing the doctors say.
So with that mind set, those who do not immunize need to walk their talk and if you choose not to listen to the medical community, or if to challenge their conclusions (and questioning authority I believe is always healthy) then you need to do the research and know why you are choosing not to and what the consequences may be, and what lifestyle you want to practice without the intervention of medicine.
One of the reasons why unimmunized children do not contract some of these diseases anyway (thus rendering the shot null for that child) is because all the other children around him/her have been immunized. There's a term for that I can't remember, like environmental immunity. But my point, to say that the child won't get something is in reality relying other children inthe world to take the shot for you! And that's the medical community at work for you. (and not proof, as some believe, that the medical community is wrong.)
If we all wiped out immunizations, those diseases would come back. So shots do have a place in social environment.
I am not trying to be pro-shots, I just want to raise the awareness to what your personal responsibilities are in this society. There was a daycare in California for non-immunized kids (because you need shots to go to public school) and an outbreak of pertussin took out half the school, because there wasn't a circle of others to protect them. I believe if the parents are going to not immunize, can you really isolate your kid thru life, ? So what are you going to do to help them fight disease naturally? That's the question and job you will be expected to undertake.
I just want people to be aware of all the issues with this. Research is super enilightening, and you need to judge this with a fair mind. Too often people choose not to becuase they are afraid of statistics and an improbable coming true (unlikely,) or they are afraid of hurting their child, but then they fail to take on the crusade of teaching their child how to fight disease, or teach the world for that matter on how to fight disease. They only think about their child only. An unimmunized child can host bacteria too and infect others around them. So this is a quesiton where you need to look at a very very big picture.
Good luck, keep reading and learning!
(in response to Mary's post above: the parents did win in that case, but in light of the full case, the child also had a pre-existing medical condition that the vaccine triggered and resulted in autism-like symptoms. It wasn't concluded that the vaccine caused autism, but that it was involved in exasperating a genetic disposition the child had already, that the parents didn't know about prior to the vaccine. Just wanted o clarify bcause too often people are saying the vaccine causes autism in a direct one-to-one relationship and that simply isn't the case here.)