I've often wondered if Aluminum in vaccines was a culprit of my son's hyper-sensitive immune system. It's a known neurotoxin that is used as an adjuvant in vaccines to trigger an immune response to make the vaccine effective. The problem is that sometimes that response goes into over-drive and doesn't shut off, which is what the medical doctors suspect is what happened in my son's case. This Age of Autism article interviews Dr. Chris Shaw who along with Lucija Tomljenovic published a study on this very topic in the August 2011 Journal of Inorganic Biochemistry titled, "Do aluminum vaccine adjuvants contribute to the rising prevalence of autism?"
In conclusion the study stated that: "Aluminum has all the necessary biochemical properties to induce neurological and immune disorders; and (iii) autism is a multisystem disorder characterized by dysfunctional immunity and impaired brain function. Because the current safety data for Al exposure in infants and children is unsatisfactory and because this demographic represents those who may be most at risk for complications following vaccination, a more rigorous evaluation of Al adjuvant safety than what has been provided to date seems warranted."