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Donate Fact Checked # Fact Checked: Vaccines: Safe and Effective, No Link to Autism Home / News Room / Fact Checked / Fact Checked: Vaccines: Safe and Effective, No Link to Autism ## The Claim in Context Some individuals wrongly assert there is a link between vaccines and autism. B

FactCheck.org® A Project of The Annenberg Public Policy Center FactCheck Posts › Featured Posts › SciCheck # Revised CDC Website About Autism and Vaccines Is Not Evidence-Based By Jessica McDonald and Kate Yandell Posted on This article is available in both English and Español Under Robert F.

Researchers analyzed data from over 1.2 million children across five large cohort studies and five case-control studies. They found no connection between vaccines and autism, including the MMR vaccine, thimerosal and mercury exposure. This large-scale meta-review provides strong evidence that vacc

## Vaccines do not cause Autism\ Pursuant to the Data Quality Act (DQA), which requires federal agencies to ensure the quality, objectivity, utility, and integrity of information they disseminate to the public, this webpage has been updated because the statement "Vaccines do not cause autism" is no

Find a Pediatrician ##### Safety & Prevention All Around At Home At Play Immunizations RSV Quiz HPV Q&A Childhood Immunizations Quiz Measles Facts: Test Your Knowledge On The Go Image 8 Image 9 recently added misleading claims to its autism webpage. We want to be clear: decades of high-quality

## Recommendation A recent paper falsely claimed that childhood vaccines are linked to developmental disorders. Debunking messaging may explain that the paper, which was published on a blog, is not a legitimate study; wasn’t peer-reviewed; was funded, written, and “reviewed” by well-known anti-vacc

“No environmental factor has been better studied as a potential cause of autism than vaccines. This includes vaccine ingredients as well as the body’s response to vaccines,” the Autism Science Foundation said in a statement Thursday. child receives vaccination whooping cough Vaccines Fast Facts D

Recently, officials in the federal government suggested that acetaminophen is a cause of autism. The data they relied on were from limited studies that are not considered to represent the overwhelming body of evidence. For these reasons, scientists who study autism and professional organizations rep

For more than two decades, the science has been conclusive: the overwhelming evidence shows that vaccines do not cause autism. This is not a matter of debate. The evidence base includes more than 50 high-quality studies, multiple Cochrane reviews, and data from over 15 million children worldwide. Re

Avoiding vaccination exposes the individual and the community to the risk of contracting long-forgotten diseases. The fact that the association between the MMR vaccine and autism persists in the public's mind despite plenty of scientific evidence to the contrary raises questions about what constitut

Skip to nav Skip to content # Statement on CDC’s vaccines and autism webpage ###### Last Updated November 20, 2025 Decades of rigorous and scientifically sound research have proven that vaccines do not cause autism. CDC’s sudden decision to change language on its website reversing that finding i

"The new statement shows a lack of understanding of the term 'evidence,'" the Autism Science Foundation said in a statement the organization provided to NPR, adding, "No environmental factor has been better studied as a potential cause of autism than vaccines." It's a statement that's confusing by

Timing may be behind why people believe vaccines and autism are related. Some children begin to show signs of autism spectrum disorder around the same time they receive the vaccine for measles, mumps, and rubella. ### Myth: Vaccinations aren’t safe to get while pregnant. Fact: Actually, the opposi

The misconception that vaccines cause autism originated from a 1998 study that was later retracted because it contained falsified data and conclusions not based on scientific evidence. Because of this study, false narratives have been ongoing and have gown in the years following the COVID-19 pandemi

The perceived unexplained rise in autism incidence and the mystery surrounding the causes of autism continues to feed the myth linking autism to immunizations schedule. A study in Italy that investigated vaccine beliefs in Italian mothers concluded that “When trying to make sense of the unpredictabl

Scientists are learning more about potential causes of autism all the time. One thing we know with certainty is that vaccines are not one of the causes. There is no single, root cause of autism. A combination of influences is likely involved. Certain genetic syndromes are associated with a higher li

Myth:Vaccines cause autism and sudden infant death syndrome (SIDS). [...] during the same age range that children are receiving their routine immunizations. The 1998 study that raised concerns about a possible link between measles-mumps-rubella (MMR) vaccine and autism was retracted by the journal t

The idea that thiomersal was a cause or trigger for autism is now considered disproven, as incidence rates for autism increased steadily even after thiomersal was removed from childhood vaccines. The cause of autism and mercury poisoning being associated is improbable because the symptoms of mercury

language, cognition, emotion and processing of information. The types of brain cells that are affected in autism start to grow during prenatal development, adding to evidence that autism starts before birth. Just like any complex disorder, genetics together with environmental factors play a role. Sc

## Vaccines and autism Scientists have conducted extensive research all over the world over the last two decades to examine the link between childhood vaccinations and autism. The result of this research is clear: vaccines do not cause autism. Additionally, vaccination can protect children from ma

1. Home 2. Topics 3. Immunization 4. Debunking Immunization Myths # Debunking Immunization Myths ## Resources to manage false information about vaccines Get your answers to the most common myths about immunizations and vaccines. Myth: Vaccines cause autism. Explanation There are no detailed st

Many studies around the world, involving hundreds of thousands of children, have all found the same thing: vaccines do not cause autism. Vaccines do not cause autism. I'm wondering about autism. Are vaccines safe for my child? Vaccines & Autism: Unraveling the Myth Learn More: kingcounty.gov/immuniz

# Vaccines and autism # Vaccines and autism Autism has been studied for decades, including its causes. As with other conditions, when we don’t understand their cause, many things can be considered as the cause. For many years, people have questioned things that babies are exposed to before

Researchers have had two responses to this allegation: First, data don’t indicate that vaccines increase the risk that children will contract other infections. Second, vaccines have become much more targeted over time, often involving fewer antigens to stimulate the immune system than earlier versio

### Here's what you need to know: #### Autism spectrum disorder Autism spectrum disorder is a condition related to brain development that affects how a person perceives and socializes with others. This disorder causes problems in social interaction and communication. It also includes limited and r