Richard Edelman speaks onstage during the Edelman session at the Cannes Lions Festival 2018 on June 19, 2018 in Cannes, France. (Richard Bord/Getty Images for Cannes Lions) The assumptions health communicators have relied on for decades are spectacularly wrong. Doubts about nutrition, vaccination, and public safety recommendations are no longer a fringe view. They stem neither from a single ideology nor lack of education, and do not result from distrust of doctors or experts.