The claim that vaccines cause autism is a persistent myth—one that is not supported by scientific evidence. Numerous large-scale, peer-reviewed studies have consistently found no link between childhood immunizations and Autism Spectrum Disorder (ASD). This includes the MMR (measles, mumps, rubella) vaccine, which was wrongly targeted in the original source of misinformation.

This misconception originated from a 1998 study that was later retracted due to serious methodological flaws and ethical violations. In the decades since, research involving hundreds of thousands of children worldwide has repeatedly confirmed vaccine safety and reaffirmed that vaccines do not cause autism.

Autism is a neurodevelopmental condition with roots in genetic and early brain development factors. It is not caused by vaccines, parenting choices, or diet.

At Happy Haven ABA, we support families with evidence-based information so they can make confident, informed health decisions. Vaccines protect children from serious preventable diseases, and delaying or avoiding them based on misinformation can pose real health risks.

Frequently Asked Questions

Do vaccines cause autism?

No. There is no scientific evidence linking any vaccine to the development of autism. Multiple large studies over more than two decades have consistently reached this conclusion.

Where did this myth come from?

It began with a flawed and since-retracted 1998 paper that suggested a link between the MMR vaccine and autism. The study was found to be ethically and scientifically unsound, but its initial publication created lasting public misunderstanding.

Is the MMR vaccine safe?

Yes. The MMR vaccine is rigorously tested and continuously monitored for safety. It is approved by the FDA, recommended by the CDC and the American Academy of Pediatrics, and has been administered safely to hundreds of millions of children worldwide.