Rollout natural experiments disprove link

Using cross‑jurisdiction differences in the timing and uptake of vaccine rollouts, researchers can treat exposure timing as a natural experiment; pooled across available datasets, that design yields a risk ratio near 1 (0.97, 95% CI 0.84–1.13) for vaccines causing autism, effectively ruling out modest causal effects. The author provides a replication package (vaccineeffects.com) and supplementary analyses that test cumulative, interaction, and diagnostic‑drift explanations. — If robust, this causal design and open replication materially reduces a major misinformation tail, reshaping public‑health messaging, policy priorities, and litigation or regulation arguments about vaccines.