There have been large studies in different countries on autism and vaccinations and no credible link has been found.
Study | Location | Sample Size | Key Finding |
---|
Madsen et al. (2002) | Denmark | >500,000 children | No association between MMR and autism |
Taylor et al. (2014, meta-analysis) | Global | 1.2 million+ children | No link between vaccination and autism |
Jain et al. (2015) | U.S. | >95,000 children, including siblings of autistic children | No increased risk of autism, even in high-risk families |
For reference
The claim that started the vaccine-autism myth came from a 1998 study by
Andrew Wakefield, which has since been:
- Retracted by the journal The Lancet
- Debunked by further research
- Discredited due to ethical violations and financial conflicts of interest
- Wakefield was stripped of his medical license
On a broader front, the increase in diagnosis of autism is true across multiple countries and while there could be some, as yet unknown, external factor or factors, the generally held opinion is that testing, reporting and diagnosis is just more stringent now.
Country | Historical Rate (1990s–2000s) | Recent Rate (2020s) | Notes |
---|
United States | 1 in 150 (2000) → 1 in 36 (2023) | ~2.8% of 8-year-olds (CDC) | One of the most aggressive diagnostic/reporting systems |
United Kingdom | ~1 in 200 (1990s) → ~1 in 57 (2021) | ~1.8% (ONS & NHS) | Broadening of criteria and strong advocacy contributed |
Canada | ~1 in 150 (2003) → ~1 in 50 (2022) | ~2.0% (PHAC) | Rates vary by province; access to services influences diagnosis |
Australia | 1 in 200 (1990s) → ~1 in 65 (2022) | ~1.5% (ABS) | Increase aligned with changes in DSM-5 adoption |
France | ~1 in 500 (2000) → ~1 in 100 (2022) | ~1% (Santé Publique France) | Historically underdiagnosed; catching up |
Sweden | 1 in 160 (2000s) → ~1 in 45 (2020s) | ~2.2% | National health registries give more consistent tracking |
Norway | ~1 in 200 (1990s) → ~1 in 50 (2020s) | ~2% | Diagnosis generally follows DSM and ICD trends |