I understand your concern with immunizations regarding the autism scare. In my un-medical opinion, though, the risk of your child contracting the diseases for which we are immunized is far greater than them getting autism. I am not a doctor though so I really have no sway in the matter.
There might be a reason that so many doctors recommend immunizations right away. The effects of Polio are paralysis. What a nightmare that would be for your child to contract that horrible disease. It used to be irradiated but with an unimaginable influx of illegal immigrants we are seeing the formally kaput diseases rear their ugly heads again.
I do have a friend that feels similarly to you though, if you would like I can give your email address to her. Let me know.