Children’s Health Defense, founded by the health secretary, had published online a vaccine-safety page that looked like the agency’s but that suggested links to autism. Robert F. Kennedy Jr., the nation’s health secretary, on Saturday instructed leaders of the nonprofit he founded to take down a web page that mimicked the design of the Centers for Disease Control and Prevention’s site but laid out a case that vaccines cause autism.
The page had been published on a site apparently registered to the nonprofit, the anti-vaccine group Children’s Health Defense. Mr. Kennedy’s action came after The New York Times inquired about the page and after news of it ricocheted across social media.