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Is Autism Now Disclosed as a DTaP Vaccine Side Effect?

Here's a look into our efforts to dispel misinformation about the widely misunderstood condition.

by Rae Deng, March 22, 2016


A man holds up a rainbow sensory push pop toy shaped like a heart.

Image courtesy of Getty Images


Rumors about autism, a developmental disorder, have spread online for decades. 

Snopes reporters have worked to dispel several of these claims, many of them centered around the longstanding and thoroughly debunked rumor that vaccines cause autism. For example, we determined that a two-decade long study from Denmark showed no link between vaccines and autism. We also investigated the origins of a misleading and faulty study that claimed to show links between vaccines and autism. 

During U.S. President Donald Trump's second term, he directed Department of Health and Human Services Secretary Robert F. Kennedy Jr. to investigate the causes of autism — leading Snopes to investigate various claims or purported policy decisions made by Kennedy, who frequently expresses harmful and false stereotypes about autism, according to experts and advocates for autistic people. 

Here are 12 of our investigations into rumors surrounding the often misunderstood condition, also known as autism spectrum disorder. 

 


By Rae Deng

Rae Deng specializes in government/politics and is based in Tacoma, Wash.

Does Tylenol use during pregnancy cause autism? Here's what science says

Sept. 24, 2025

There's no definitive evidence that Tylenol causes autism, and multiple medical groups have reit ...

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A white man wearing a blue suit speaks at a microphone.

Yes, RFK Jr. said autistic children will never pay taxes, hold a job, play baseball or write a poem

April 18, 2025

The U.S. health secretary was giving a press briefing about CDC findings on the growing number o ...

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No link between aluminum in childhood vaccines and chronic illnesses, Danish study found

July 31, 2025

Danish researchers followed 1.2 million children and found aluminum in vaccines did not cause au ...

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Trump claimed autism rates are rising. Here are the facts

March 8, 2025

Trump has promised that Robert F. Kennedy Jr., the country's health secretary, will "figure out ...

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A white man with greying hair and a dark tan points at the camera. He is wearing a grey suit with a dark tie and standing behind a podium.

Breaking down RFK Jr.'s alleged 'autism registry' tracking Americans with the condition

May 3, 2025

The National Institutes of Health director said they were launching an autism registry — but a H ...

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The Amish Don't Get Autism?

Oct. 28, 2016

Anti-vaccine advocates have long used the Amish as evidence that vaccines cause autism, a conclu ...

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Investigating rumor about CDC, CPS harassment over 'autism therapy camps' in Florida

Sept. 10, 2025

Users discussed a story in September 2025 claiming CDC and CPS officials harassed a mother for r ...

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'First Ever' Study Comparing Vaccinated and Unvaccinated Children Shows Harm from Vaccines?

May 17, 2017

This study, with its suspect statistics and devil-may-care attitude toward methodological design ...

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Study Alleging a Connection Between Vaccines and Autism 'Unpublished' By Journal

Nov. 29, 2016

The study, published in a controversial journal, was removed after widespread criticism of its m ...

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Does Peppa Pig Cause Autism?

Oct. 21, 2016

Talk of a Harvard study linking the popular British children’s show “Peppa Pig” to autism went v ...

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Are People Attempting to Cure Their Children's Autism with Bleach Enemas?

Sept. 4, 2018

A “church” falsely claimed that a form of industrial bleach considered a “sacrament” can cure vi ...

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Girl receiving vaccine for cervical cancer

Is Autism Now Disclosed as a DTaP Vaccine Side Effect?

March 22, 2016

Autism has not just been listed as a known side effect of the DTaP vaccine; it's a remnant of de ...

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