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Another Study Sees No Vaccine-Autism Link

Experts say finding should reassure parents of young children

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The CDC team found that kids' total antigen exposure in the first two years of life was unrelated to their risk of developing an autism disorder.

That was also true when they considered babies' antigen exposure in the first three months of life, and the first seven months. Nor was there any connection between autism risk and the amount of vaccine antigens children received on any single day.

"This provides evidence that concerns about immune system overstimulation are unfounded," DeStefano said.

Geraldine Dawson, chief science officer for the advocacy group Autism Speaks, said the study "adds to the existing literature showing no connection between vaccines and autism in large epidemiological studies."

She added, though, that further research is needed "to explore whether, in rare cases, a genetic vulnerability might increase susceptibility to vaccine-related side effects, including the triggering of autism symptoms in a genetically and medically susceptible child."

Both Offit and DeStefano stressed that there is no reason for parents to delay vaccinating their child.

"This is one more piece of evidence to help reassure parents," Offit said.

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