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The autism 'epidemic': misinterpretation, misinformation and conspiracy
1Oregon Health & Science University, Portland, OR, USA. fombonne@ohsu.edu.
European Journal of Epidemiology
|October 10, 2025
Summary
US health officials claim an autism epidemic, but studies show increased prevalence is due to better diagnosis and awareness, not environmental toxins. Finding a specific toxin is unlikely given autism
Area of Science:
- Neurodevelopmental Disorders
- Public Health Policy
- Environmental Toxicology
Background:
- US Department of Health & Human Services (HHSS) claims an autism epidemic driven by environmental toxins.
- This assertion contradicts scientific consensus on autism prevalence trends.
- The HHSS's claims contrast with expert opinions on autism's rising rates.
Purpose of the Study:
- To address and refute misconceptions regarding the rise in autism prevalence.
- To explain factors contributing to increased autism diagnosis rates.
- To critique the HHSS's assertion of an autism epidemic and environmental toxin causation.
Main Methods:
- Analysis of changes in autism definition, diagnostic criteria, and ascertainment.
- Review of contextual factors influencing autism detection and diagnosis.
- Evaluation of the scientific plausibility of identifying an environmental toxin for autism.
Main Results:
- Increased autism prevalence is attributed to evolving diagnostic practices, improved awareness, and better access to services.
- The concept of an autism epidemic driven by a single environmental toxin is misleading.
- The genetic complexity and heterogeneity of autism make identifying a specific environmental cause improbable.
Conclusions:
- The rise in autism prevalence is a complex phenomenon driven by multiple factors, not an epidemic.
- The search for a single environmental toxin is scientifically unfounded and distracts from understanding autism's true causes.
- Ignoring empirical data and expert consensus risks reviving debunked theories on autism etiology.
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