Vaccines and autism
The claim originates in a twelve-child study that was retracted, whose author was found to have manipulated the data and to have been paid by litigants. Cohort studies since have followed millions of children and found nothing. Measles came back anyway.
Why this verdict
Debunked comprehensively: the originating 1998 paper was retracted for fraud after an investigation found the data had been altered, its author was struck off, and studies covering millions of children across multiple countries find no association.
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01The claim
That the measles, mumps and rubella vaccine — or the ethylmercury preservative thimerosal, or the cumulative childhood schedule — causes autism, and that health authorities and manufacturers conceal the association.
02Where it came from
In February 1998 The Lancet published a paper by Andrew Wakefield and twelve co-authors describing twelve children with developmental disorders and bowel symptoms, and suggesting a possible link to MMR. The paper itself claimed no causal proof. Wakefield made the causal claim at the press conference, calling for the combined vaccine to be suspended in favour of single shots. British MMR coverage fell from 92% to below 80%, and in parts of London below 60%.
03What the record shows
✕ DEBUNKED — Investigated and refuted. Here is what actually happened.
The paper's foundation collapsed under investigation by journalist Brian Deer and the General Medical Council. Deer established, and the GMC confirmed in a 217-day hearing, that the children had not been consecutively referred as stated but recruited through anti-vaccine campaigners; that Wakefield had received £435,000 from a solicitor preparing litigation against vaccine manufacturers, undisclosed to the journal or co-authors; that he had filed a patent application for a competing single measles vaccine; and that invasive procedures including colonoscopies and lumbar punctures had been performed without proper ethics approval. Comparing the paper against the children's actual medical records showed the data had been altered: not one of the twelve cases matched the description published.
The Lancet fully retracted the paper in February 2010. Ten of the thirteen authors had already withdrawn their names in 2004. Wakefield was struck off the UK medical register in May 2010. The BMJ concluded in 2011 that the study was 'an elaborate fraud'.
The epidemiology is overwhelming and independent of Wakefield. A Danish cohort study followed 657,461 children born 1999–2010 and found no increased autism risk after MMR, including in subgroups with autism risk factors. Earlier Danish work covering 537,303 children found the same. A 2014 meta-analysis pooled over 1.2 million children across ten studies. Thimerosal was removed from routine US childhood vaccines in 2001 as a precaution; autism diagnoses continued to rise, which by itself refutes the mercury version.
What drives the correlation people observe is timing: the first MMR dose falls between twelve and fifteen months, and autism's behavioural signs typically become recognisable in the second year. Prospective video studies of infants later diagnosed show differences present before vaccination.
04What it cost
This is the most lethal debunked entry in the archive. Measles was declared eliminated in the United States in 2000 and in the United Kingdom in 2017; both lost that status. Outbreaks followed in Wales in 2013, in Disneyland in 2015, in Samoa in 2019 — where coverage collapsed after an unrelated vaccination accident and anti-vaccine campaigning, and 83 people, mostly infants, died — and in New York, Ohio and across Europe since. The WHO named vaccine hesitancy one of the top ten global health threats in 2019. Wakefield now works in the United States making films.
05Connections
- 5G and COVID-19DEBUNKED
- The COVID-19 lab-leak hypothesisUNRESOLVED
- Fluoridation as mind controlDEBUNKED
- The LaCour canvassing studyDEBUNKED
- Miracle Mineral SupplementDEBUNKED
- MorgellonsDEBUNKED
- The polio vaccine AIDS hypothesisDEBUNKED
- Psychic surgeryDEBUNKED
- Study 329CONFIRMED
- The Sugar Research Foundation's funded scienceCONFIRMED
- The tobacco industry's manufactured doubtCONFIRMED
- The Tuskegee Syphilis StudyCONFIRMED
06Sources
Primary document · 2010
Retraction — Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children
Academic · 2019
Measles, Mumps, Rubella Vaccination and Autism: A Nationwide Cohort Study
Journalism · 2011
Secrets of the MMR scare: how the case against the MMR vaccine was fixed