The CDC's New Messaging May Be Damaging Trust in Vaccines, Study Says
A new study published in Science suggests that recent changes to the CDC's messaging on vaccines and autism—introduced without new scientific evidence—may be eroding public trust in vaccines and the agency itself. The revised guidance, which questions the long-established claim that vaccines do not cause autism, has been linked to increased skepticism and greater acceptance of anti-vaccine arguments among U.S. adults. Researchers warn that this shift could undermine vaccine confidence and lead to lower vaccination rates over time.
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Vaccines have long been considered by experts to be among the most studied medical interventions, and on the whole, Americans are still broadly supportive of them. But during President Donald Trump’s second term, the agency that makes recommendations about vaccines—the U.S. Centers for Disease Control and Prevention (CDC)—has, without new scientific evidence, cast fresh doubt on their safety and resurfaced the disproven link between vaccines and autism. Before Nov. 19, 2025, the CDC’s website was unequivocal on the topic: “Studies have shown that there is no link between receiving vaccines and developing autism spectrum disorder,” it read. After Nov. 19, the guidance essentially reversed.
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