Under Robert F. Kennedy Jr., a longtime anti-vaccine advocate who is now Health and Human Services secretary, the Centers for Disease Control and Prevention revised its website to say that its previous statement that "vaccines do not cause autism" is "not an evidence-based claim." But it's the revised website that misleads about vaccines. On Nov. 19, the CDC replaced its webpage on autism and vaccines with a new one that leans into the discredited idea that vaccines might cause autism. Numerous rigorous studies have repeatedly failed to identify any link between vaccination and autism.