The Centers for Disease Control and Prevention has made an unprecedented change to its website — reversing messaging that debunked any links between vaccines and autism.

The CDC site now says that “studies have not ruled out the possibility that infant vaccines cause autism.” It has also removed scientific reviews of vaccines from its website.

Michael Osterholm, director of the Center for Infectious Disease Research and Policy at the University of Minnesota, said his sources at the CDC tell him the new directives come from vaccine skeptic Robert F. Kennedy Jr., secretary of the Health and Human Services department. The CDC did not immediately respond to a request for comment on Kennedy’s role in the decision.

“What Secretary Kennedy has done is an attempt to basically reduce the use of

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