The appointment of Robert F. Kennedy Jr. as head of the Department of Health and Human Services (HHS) will be a “health disaster” in the United States, warn disinformation experts. His penchant for conspiracy theories and anti-vaccination rhetoric is likely to colour the direction of US health agencies.

Timothy Caulfield, a professor at the University of Alberta who studies health misinformation, would never have imagined that Robert F. Kennedy Jr. could be at the head of federal health agencies. “I never thought that someone so dangerous and so malicious would be elevated to such a level of power. I’m very concerned.”

He is not alone in fearing the impact on medicine and science in the United States. David Gorski believes that the health of Americans is clearly at stake. “It’s going to cause generational damage and it’s going to reinforce people’s distrust of science,” says the professor of surgery at Wayne State University, an expert in medical misinformation and editor-in-chief of the Science Based Medicine website.