DoubleChecks

What was claimed

Study of 2.5 million children finds no link between MMR vaccine and autism.

Our verdict

Accurate

The study included 2,560,035 children and found no association between receiving MMR before age two and autism diagnosis. Its primary estimate was an adjusted hazard ratio of 0.97, with a 99% confidence interval of 0.91 to 1.03.

All 3 AI systems agree10 sources citedChecked Oct 9, 2026

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Key findings

A study of approximately 2.5 million children found no link between MMR vaccination and autism.

Verified95%
All 2 AIs agree

Verified against 10 sources

healthline.comhealthychildren.orglinkedin.comreuters.comyahoo.compsypost.orgtechnologynetworks.compmc.ncbi.nlm.nih.govindependent.co.ukindependent.co.uk

Detailed Analysis

The claim is supported by a large U.S. retrospective cohort study of 2,560,035 children. It found no statistically significant association between MMR vaccination before age two and autism, although the observational design cannot by itself prove causation.[1] [6]

Why this verdict

  • The claim is supported by a large U.S.
  • retrospective cohort study of 2,560,035 children.
  • It found no statistically significant association between MMR vaccination before age two and autism, although the observational design cannot by itself prove causation.[1] [6]

Claims checked

A study of approximately 2.5 million children found no link between MMR vaccination and autism.

Verified98%
The study included 2,560,035 children and found no association between receiving MMR before age two and autism diagnosis. Its primary estimate was an adjusted hazard ratio of 0.97, with a 99% confidence interval of 0.91 to 1.03.[1] [6]

What other AI think

A recent study of over 2.5 million children found no evidence that receiving the MMR vaccine before age two increases the risk of autism diagnosis. The claim is factually accurate and well-supported by multiple credible sources.

Why this verdict

  • A recent study of over 2.5 million children found no evidence that receiving the MMR vaccine before age two increases the risk of autism diagnosis.
  • The claim is factually accurate and well-supported by multiple credible sources.
A large, recent retrospective cohort study using electronic health records of about 2.56 million U.S. children found no association between receiving a first MMR vaccine before age 2 and subsequent autism diagnosis. The claim accurately summarizes those findings and the study size within typical rounding tolerance.

Why this verdict

  • A large, recent retrospective cohort study using electronic health records of about 2.56 million U.S.
  • children found no association between receiving a first MMR vaccine before age 2 and subsequent autism diagnosis.
  • The claim accurately summarizes those findings and the study size within typical rounding tolerance.

Claims checked

Study of 2.5 million children finds no link between MMR vaccine and autism.

Verified92%
A 2026 retrospective cohort analysis of ~2,560,035 U.S. children reported no increased autism risk after first MMR vaccination before age 2, so the summarized claim is an accurate, rounded statement of the study's result.

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