Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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HEALTH

The Claim

Vaccines cause autism spectrum disorder in children.

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The Short Version

This claim is false. Decades of research — including WHO's December 2025 review of 31 studies, a Danish study of over 1 million children, and reviews by the National Academies and AAP — consistently find no causal link between vaccines and autism. The original 1998 Wakefield study that sparked this myth was retracted for fraud. A 2025 CDC website update noting causation hasn't been "ruled out" reflects uncertainty, not evidence of causation, and was criticized by the National Academies for lacking context.

Caveats

  • The original 1998 Wakefield study linking MMR vaccines to autism was retracted due to ethical violations and data fraud, and Wakefield lost his medical license.
  • A November 2025 CDC website update stating studies haven't 'ruled out' a vaccine-autism link is a statement of scientific uncertainty, not evidence of causation — the National Academies criticized this language for stripping away essential context.
  • Claiming that 'not ruled out' equals evidence of causation is a well-known logical fallacy (argument from ignorance) and does not override the consistent findings of large-scale epidemiological studies.

The Receipts

  1. WHO expert group's new analysis reaffirms there is no link between vaccines and autism

    WHO

  2. Statement of the WHO Global Advisory Committee on Vaccine Safety (GACVS) on vaccines and autism

    World Health Organization (WHO)

  3. Vaccine Safety: Examine the Evidence

    HealthyChildren.org (American Academy of Pediatrics)

  4. Vaccination as a cause of autism—myths and controversies

    PMC (PubMed Central)

  5. Vaccines and autism : summary of CDC conducted or sponsored ...

    CDC Stacks

  6. Statement on CDC's Updated Vaccine Guidance

    National Academies

  7. Andrew Wakefield and the MMR Vaccination Controversy Background The Wakefield Study Reaction and Retraction - VTechWorks

    VTechWorks

  8. Large Danish Study: No link between vaccines and autism or 49 other health conditions

    Statens Serum Institut (SSI)

  9. The relationship between autism and autism spectrum disorders and vaccination: review of the current literature | Trends in Pediatrics

    Trends in Pediatrics

  10. WHO expert group reaffirms no link between vaccines and autism - UN News

    UN News

+ 5 more sources — see the full list on Lenz

Filed Under

Andrew WakefieldAutism Spectrum Disorder (ASD)Centers for Disease Control and PreventionMMR vaccineThimerosalvaccines

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