For the First Time, CDC Acknowledges Vaccine-Autism Link Possibility
By Ashley Bateman
On November 19, the Centers for Disease Control and Prevention (CDC) updated its website to address questions regarding the relationship between vaccines and autism.
“The claim ‘vaccines do not cause autism’ is not an evidence-based claim because studies have not ruled out the possibility that infant vaccines cause autism,” the website now states, also acknowledging health authorities previously “ignored” studies supporting such a link
Additionally, the website highlights Health and Human Services’(HHS) initiatives to investigate possible causes of autism and determine the safety of the pediatric vaccine schedule, as discussed in HHS’s initial Make America Healthy Again (MAHA) report.
Despite these updates to the CDC website, however, the phrase “Vaccines do not cause autism” remains on the site due to “an agreement with the chair of the U.S. Senate Health, Education, Labor, and Pensions Committee,” a footnote states.
Correlation and Causation
The CDC vaccine schedule recommends 29 injections by one year of age, up from three in 1986, states the MAHA report.
Since birth year 1992, the prevalence of autism spectrum disorder has risen from one in 150 children to one in 31, for children born in 2014.
The CDC references one survey, in 2006, showing half of parents of autistic children believed vaccines had a causal effect.
Before his appointment to HHS, Robert F. Kennedy Jr. advocated publicly for greater scrutiny of vaccines and the potential relationship between vaccines and pediatric illness. His foundation, Children’s Health Defense, has published studies linking vaccine components and autism.
The updated CDC website states the cause of autism is “likely…multi-factorial,” and that at least one study has found a correlation between aluminum adjuvants in vaccines and increased rates of autism, and while “correlation does not prove causation…it does merit further study.”
Quality Control Concerns
In August, HHS announced the reinstatement of a federal task force on pediatric vaccine safety after a nearly three-decade hiatus. The task force would “advance vaccine safety and support innovation that protects children without compromise,” and would make recommendations on the “development, promotion and refinement of childhood vaccines that result in fewer and less serious adverse reactions,” states an HHS press release.
For thirty years, quality control regulation of pediatric vaccines has had legal limitations. That has created major conflicts of interest, states the initial MAHA report.
“The National Childhood Vaccine Injury Act of 1986 was enacted in response to liability concerns surrounding injuries linked to the three routine childhood vaccines in use at the time,” the report states.
Rather than enacting a law to ensure routine vaccine safety and reparations for injury, the law “shields vaccine manufacturers from liability for vaccine-related injuries…This framework creates financial disincentives for pharmaceutical companies to identify safety issues either pre- or post-licensure.” The report points out, HHS “has the conflicting duty” to both promote and defend vaccines against injury claims.
Limited data
The lack of data on pediatric vaccine impact led Peter McCullough, M.D., to research a potential link to autism.
Several weeks before the CDC updated its website, the McCullough Foundation published a landmark autism study. In a review of 136 pediatric vaccine studies, 107 “inferred a possible link between immunization or vaccine components and ASD or other neurodevelopmental disorders,” states the study.
One problem has been the lack of a control group consisting of unvaccinated children. Major medical groups, such as the American Academy of Pediatrics, have published hypotheses regarding the rise in autism, but exclude vaccines as a potential driver. In May 2025, HHS announced a change in policy to now require placebo-controlled trials before approving any new vaccine.
Parents Trust Doctors
Recognition of vaccine injuries in the pediatric population on the CDC’s website may help parents receive compensation, but it will not likely change parents’ minds about whether or not to vaccinate, says Jane Orient, M.D., the executive director of the Association of American Physicians and Surgeons.
“I suspect that very few parents look at the CDC website before their child gets the shots,” said Orient. “They believe what their doctor says and the dumbed-down ‘vaccine information sheets,’ if they read those.”
Change May Empower Parents
Parents, however, may take note of the CDC position change and may now have the power to challenge vaccine mandates, says Chris Downey, founder of VaxCalc, an online site to help parents make vaccine decisions.
“When the CDC softens language on a topic they’ve treated as settled for 20 years, parents immediately feel the ground move,” said Downey.
“It tells them the science is far less absolute than they were led to believe, and their instincts were never ‘misinformation,’ they were valid questions all along,” said Downey. “Parents make better decisions when the messaging becomes honest instead of absolute. This change invites parents to pause, look at the evidence themselves, and choose what makes sense for their child, not ‘children in general.’”
The medical establishment has pushed the idea that multiple vaccines in a single visit are safe, that vaccines are safe and effective for everyone, the United States sets standards globally, and that reports of vaccine reaction are parental overreaction, says Downey.
“The CDC has multiple major dogmas to clarify,” said Downey.
Mandate Regime
Risk of serious adverse reactions to vaccines ought to result in a repeal of all vaccine mandates, but manufacturers’ powerful lobbying will strenuously oppose it, says Orient.
“In the United States, it should be self-evident that people have the right to make their own medical choices,” said Orient. “However, this right is frequently violated by authorities citing ‘public safety’ or concerns about child abuse or neglect. Due to the decline in educational standards and failure to teach critical thinking, fewer people are capable of making good choices or have the confidence to assert themselves.”
Ashley Bateman ([email protected]) writes from Virginia.
