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Index/Topics/Vaccines and Autism Link

Vaccines and Autism Link

The claim that vaccines are linked to autism has been disproven by decades of large-scale, high-quality studies, including analyses of MMR and thimerosal-containing vaccines.

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Jan 11, 2026

What biological mechanisms have been proposed for vaccines causing autism, and what evidence exists for or against them?

Three broad biological mechanisms have been proposed to explain a putative causal link between vaccines and autism—the MMR vaccine triggering intestinal damage and brain effects, mercury-containing pr...