Multiple outlets reported that the U.S. Centers for Disease Control and Prevention revised language on a vaccine‑safety webpage to state that claims vaccines do not cause autism are not evidence‑based because studies have not ruled out all possibilities, and that the agency would investigate possible links. The change has drawn sharp criticism from public‑health experts and pediatric societies, who say the revision contradicts a large body of high‑quality studies showing no causal link. The update prompted warnings about eroding public trust and potential declines in vaccination uptake; the CDC and HHS have framed the change as part of a broader reassessment of autism research.