DoubleChecks

What was claimed

No link between MMR vaccination before age 2 and autism, large US study suggests

Our verdict

Accurate

A recent large U.S. retrospective cohort study of over 2.5 million children found that receiving the first MMR vaccine dose between 11.5 and 24 months was not associated with increased autism risk (adjusted hazard ratio ~0.97, with confidence intervals near 1.0). This result aligns with multiple prior large studies and meta-analyses concluding no causal link between MMR vaccination and autism.

All 3 AI systems agree20 sources citedChecked Aug 6, 2026

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Key findings

No link between MMR vaccination before age 2 and autism, large US study suggests

Verified94%
All 2 AIs agree

Verified against 20 sources

pmc.ncbi.nlm.nih.govpubmed.ncbi.nlm.nih.govcidrap.umn.educhop.edunejm.orgautismspeaks.orgpmc.ncbi.nlm.nih.govhouse.mn.govcdc.govtrendspediatrics.compubmed.ncbi.nlm.nih.govacpjournals.orgpubmed.ncbi.nlm.nih.govncbi.nlm.nih.govpmc.ncbi.nlm.nih.govgavi.orgpmc.ncbi.nlm.nih.govpmc.ncbi.nlm.nih.govpmc.ncbi.nlm.nih.govncbi.nlm.nih.gov

Detailed Analysis

The statement accurately reflects findings from a recent large U.S. cohort study and is consistent with the broader scientific literature. Multiple high-quality studies and reviews show no association between MMR vaccination before age 2 (or at any age in childhood) and autism.

Why this verdict

  • The statement accurately reflects findings from a recent large U.S.
  • cohort study and is consistent with the broader scientific literature.
  • Multiple high-quality studies and reviews show no association between MMR vaccination before age 2 (or at any age in childhood) and autism.

Claims checked

No link between MMR vaccination before age 2 and autism, large US study suggests

Verified96%
A recent large U.S. retrospective cohort study of over 2.5 million children found that receiving the first MMR vaccine dose between 11.5 and 24 months was not associated with increased autism risk (adjusted hazard ratio ~0.97, with confidence intervals near 1.0).[2] [3] This result aligns with multiple prior large studies and meta-analyses concluding no causal link between MMR vaccination and autism.[1] [5] [11] [13] [14] [16] [17]

What other AI think

A large US study examined electronic health records of more than 2.5 million children and found that receiving the first MMR vaccine dose from ages 11.5 to 24 months was not associated with an increased likelihood of having an autism diagnosis. The headline accurately reflects this finding.

Why this verdict

  • A large US study examined electronic health records of more than 2.5 million children and found that receiving the first MMR vaccine dose from ages 11.5 to 24 months was not associated with an increased likelihood of having an autism diagnosis.
  • The headline accurately reflects this finding.
Multiple large, well-designed studies in the U.S. and elsewhere have found no association between MMR vaccination (including receipt before age 2) and later autism diagnoses. Public health organisations and peer-reviewed cohort and case-control studies consistently report no causal link.

Why this verdict

  • Multiple large, well-designed studies in the U.S.
  • and elsewhere have found no association between MMR vaccination (including receipt before age 2) and later autism diagnoses.
  • Public health organisations and peer-reviewed cohort and case-control studies consistently report no causal link.

Claims checked

No link between MMR vaccination before age 2 and autism, large US study suggests

Verified92%
Several large U.S. cohort and registry-based studies (and many international studies) have reported no increased risk of autism after MMR vaccination given before age 2, and major public health bodies state there is no evidence of a causal link.

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