The OP asked for non-biased information.
This is the best reference.
http://www.iom.edu/CMS/3793/4705/20155.aspx
This eighth and final report of the Immunization Safety Review Committee examines the hypothesis that vaccines, specifically the measles-mumps-rubella (MMR) vaccine and thimerosal-containing vaccines, are causally associated with autism. The committee reviewed the extant published and unpublished epidemiological studies regarding causality and studies of potential biologic mechanisms by which these immunizations might cause autism.
The committee concludes that the body of epidemiological evidence favors rejection of a causal relationship between the MMR vaccine and autism. The committee also concludes that the body of epidemiological evidence favors rejection of a causal relationship between thimerosal-containing vaccines and autism. The committee further finds that potential biological mechanisms for vaccine-induced autism that have been generated to date are theoretical only.
The committee does not recommend a policy review of the current schedule and recommendations for the administration of either the MMR vaccine or thimerosal-containing vaccines. The committee recommends a public health response that fully supports an array of vaccine safety activities.
In addition, the committee recommends that available funding for autism research be channeled to the most promising areas. The committee makes additional recommendations regarding surveillance and epidemiological research, clinical studies, and communication related to these vaccine safety concerns
"Epidemiological evidence" means that they studied the chemistry behind the vaccines, and the existing literature in regards to vaccines and autism. There has NEVER been a full scale study comparing vaccinated children to unvaccinated children here in the US.
It would be very easy to do, there are a good amount of unvaccinated kids, but there is no funding for such a study. Many believe that is because it is blocked by lobbying pharma companies...but you have to buy into some conspiracy theories for that!
Many people theorize that it is not the actual antibodies found in the vaccines that are the problem, but the preservatives and adjuvants that are added to the vaccines.
The testing for vaccines is not always a straightforward thing, for example ...The recent HPV vaccine safety study didn't compare the vaccine against saline, but against a solution that contained the preservatives and adjuvants that are in the vaccine. So when Merck says that the vaccine was found to have "similar reactions and side affects to the placebo"...they are right, they are similar... because most people are reacting to what is added to the vaccine over and above the antibody.
Until there is a full scale US study that compares children that are vaccinated against children that have not been vaccinated... there can be no conclusive summation that there is no link. The study has to be more than an examination of existing data, but a new collection of BALANCED information.
There have been articles during the last year pointing out the extremely low occurance of autism in the Amish community, and the fact that they generally do not vaccinate. I'm sure you can find the info with a simple search.
But, I want to say--last year as an adult, I suffered with a case of pertussis (whooping cough). It was horrible. I actually cannot imagine how an infant or very young child could live through this. I had several occasions where my airway just "locked" up.
Having experienced that, I don't think I could not have my child receive the vaccine for this illness--especially since there is a new resurgence of the disease.
My dd was fully vaccinated against pertussis (received all her shots and boosters through 4yo, which is considered "fully" protected). She contracted pertussis anyway...we don't know where from as noone at her daycare or any of our friends had it... and gave it to ME. I was 7mo pregnant at the time.
Both dd's pediatrician and my family doctor both said that most of the pertussis cases that they see/hear of are in children that are supposed to be "fully protected." These are not older kids that have had their vaccine wear off and need a booster, but young kids like my dd. It was obvious to both of them (in separate conversations) that the current DTaP vaccine was becoming less and less effective and they were figuring out that the current strain of pertussis was no longer "covered" but the available vaccine.
We selectively vaccinated dd and I felt at the time that DTaP was important specifically to protect my her from pertussis. It turns out that it was the most volatile vaccine for her (she had a lump in her leg for 2+mo after each injection which was explained to us as a "normal" reaction).
Based upon our experiences w/ pertussis and the lack of efficacy w/ the vaccine we have decided that the "risk" of the vaccine is not worth the lack of protection... and our ds will not be receiving it.
Yes, pertussis was horrid, I don't wish it on anyone and I had complications due to the fact that I have pretty bad allergies that made the cough worse.... but we didn't see any protection by the vaccine for our dd and I don't have any faith in it to work for our ds!