Public health officials are decrying President-elect Donald Trump for selecting Robert F. Kennedy Jr. to head the Department of Health and Human Services. If confirmed, Kennedy would head a sprawling agency that oversees drug, vaccine and food safety, as well as medical research. Kennedy is one of the nation’s most prominent vaccine skeptics and has spread numerous public health conspiracy theories. Kennedy has claimed HIV may not cause AIDS. He claimed COVID-19 was designed to spare Ashkenazi Jews and Chinese people. He has claimed chemicals in the nation’s water supply are leading more children to be gay and transgender, and he’s publicly spoken about removing fluoride from drinking water. “I can’t think of a darker time for public health in America and globally than now,” says Lawrence Gostin, professor of global health law at Georgetown University. “He has no fidelity to truth, to science. … He will make America sick, certainly not healthier again.”