
Health Secretary Robert F. Kennedy Jr. has personally directed the Centers for Disease Control and Prevention (CDC) to alter its longstanding position on the link between vaccines and autism, a move drawing sharp criticism. The CDC's website now states that the claim "vaccines do not cause autism" is "not an evidence-based claim" because studies have not definitively ruled out a link, departing from its previous stance. This aligns with predictions from experts like Dr. Paul Offit, who anticipated Kennedy would focus on ingredients such as aluminum adjuvants.
Mr. Kennedy confirmed to The New York Times that he ordered the CDC to change its guidance, citing perceived gaps in vaccine safety science and suggesting "studies supporting a link have been ignored by health authorities." Public health officials argue this shift undermines decades of scientific consensus and promotes misinformation.
Aluminum adjuvants, used in many vaccines for nearly a century to enhance immune response, are a central point of contention for Secretary Kennedy. He claims they are neurotoxic and tied to autism, despite extensive research consistently finding no causal link. Independent virologist Gary Grohmann states there is no evidence of significant side effects from the small amount of aluminum in vaccines.
Dr. Paul Offit, director of the Vaccine Education Center at the Children's Hospital of Philadelphia, strongly disapproved of the CDC's updated language. "These are the usual anti-vaccine tropes, misrepresentation of studies, false equivalence," Dr. Offit stated, asserting that numerous high-quality studies have consistently debunked any vaccine-autism link.
The changes have sparked outrage among major medical groups. Dr. Susan J. Kressly, president of the American Academy of Pediatrics, highlighted over 40 studies involving more than 5.6 million people concluding "no link between vaccines and autism." Critics accuse Secretary Kennedy of abusing his position to spread anti-vaccine propaganda, warning of increased vaccine hesitancy and a resurgence of preventable diseases.
Further illustrating his stance, Secretary Kennedy previously demanded the retraction of a large Danish study finding no link between aluminum in vaccines and chronic childhood diseases, which the journal refused. Under Kennedy's leadership, an ACIP working group is reportedly studying major changes to childhood vaccinations, including the potential removal of aluminum-containing compounds, moves public health experts deem scientifically unsound.