The New York Times reports that a new study suggests that environmental conditions in the womb and shortly after birth are the main factor in the development of autism. Researchers compared 202 sets of identical and fraternal twins, where at least one sibling was diagnosed with classical autism. They found that genetic factors are responsible for 38% of cases in the study, while environmental factors are responsible for 58% of cases.
It seems to me that this study deals a blow to those who believe vaccines cause autism. After all, it concludes that the two main causes of autism are environmental and genetic. Chemicals fetuses are exposed to in the womb are much more likely to cause autism than anything in vaccines.