the vaccine makers use Thermicil (sp) as a preservative as vaccines have a very short shelf life. The Thermicil is another word for Mercury. The measuremnt of Thermicil in each dosage is not considered high enough by the government to be of a concern. Now multiple each exposure by, how many vaccinations? Mercury is the 2nd most toxic thing on our planet, only plutonium is considered more toxic. Heavy metals cause neurologically damage. As long as that Mercury remains in a persons body they will continue to be handicapped.
For anyone that is reading this and know of a child suffering from Autism or even an adult with Alzheimers/Dementia there is a intravenous treatment for metal toxicity called Chelation. It's primary vitamin C dosage that sweeps heavy metals from the body via urination or a BM.
A couple of other cause of autism is through diet (fish)and Amalgam dental fillings leach into your body. A woman carrying (placenta) a child and nursing a child passes that mercury on to her baby.

We live in a toxic world folks. Garbage in garbage out.