CDC’s Vaccine-Autism Page Change Draws Sharp Criticism from Kansas Autism Researchers

A recent update to the Centers for Disease Control and Prevention website containing controversial information about vaccines and autism has sparked significant concern among Kansas autism researchers, who warn the changes could have harmful consequences.

The CDC webpage now states: “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.” This modification, made last week, was directed by Robert F. Kennedy Jr., the newly appointed Secretary of U.S. Health and Human Services, according to an interview he gave to the New York Times.

Matt Mosconi, director of the Kansas Center for Autism Research and Training (K-CART), expressed serious concerns about the updated content. “The information posted on the CDC website unfortunately contains multiple inaccurate or misleading statements,” Mosconi said. “The CDC message ignores many studies that have been conducted on this topic. And, my expectation is that this statement is confusing for individuals and families, and it has strong potential to be harmful.”

The Coalition of Autism Scientists, which includes researchers from K-CART, issued a statement condemning the change, saying “the harm caused by questioning the safety of childhood vaccines cannot be overstated.” The coalition further warned that “by altering and distorting the evidence on vaccine safety, the CDC can no longer be relied on to provide the public with accurate information.”

Mosconi emphasized that researchers have thoroughly investigated potential links between vaccines and autism over many years. “Rigorous study after rigorous study failed to find that link, so we, as scientists, follow the data to identify those factors that are associated with autism and do have potential to be informative for supporting the autism community,” he explained.

Kathryn Unruh, an assistant researcher at K-CART, highlighted multiple concerns about the CDC’s updated information, particularly its potential to decrease vaccination rates. Kansas has already experienced declining kindergarten vaccination rates in numerous counties, and the state recently contained a measles outbreak.

“As an autism researcher, we are also quite concerned with how this may misdirect attention as well as the critical funding we may need for studies that will support autistic individuals and their families,” Unruh added.

The scientific evidence contradicting the CDC’s new position is substantial. Unruh pointed to two particularly robust studies that found no association between autism and vaccinations. One 2002 Danish study included more than 500,000 children and compared autism rates between vaccinated and unvaccinated children, controlling for numerous variables including vaccination timing, gestational age, birth weight, and economic status. No connection was discovered.

Another large American study examined familial factors, considering the increased likelihood of developing autism when a sibling has the condition. “Even if kids already had one likelihood factor for developing autism, they also found no increased association with developing autism and vaccines in those children,” Unruh noted.

The original study that first suggested a vaccine-autism link included only 12 children and has since been thoroughly discredited by the scientific community.

Unruh expressed particular frustration that the CDC appears to be contradicting its own previous position. “As a scientist, I’m quite concerned that they have ignored decades of rigorous research, including multiple studies that use CDC data,” she said. She noted that an archived CDC page still contains a comprehensive list of studies demonstrating no association between vaccines and autism risk.

Scientific research has instead identified other factors potentially related to autism, including genetic components and certain environmental interactions. A 2015 study published in JAMA specifically examined children with genetic predispositions to autism and found no connection to vaccinations.

The CDC’s reversal comes at a concerning time for public health in Kansas and nationwide, as vaccination hesitancy continues to challenge efforts to prevent outbreaks of preventable diseases.