President-elect Donald J. Trump’s pick for health secretary opposes fluoride in water, promotes unproven Covid therapies and has threatened to prosecute medical journals.

Robert F. Kennedy Jr.’s selection to serve as President-elect Donald Trump’s top health official is prompting questions from policy watchers over how the pick will handle the range of key health policies that would fall under his purview.

Of the many unorthodox positions taken by Robert F. Kennedy Jr., US President-elect Donald Trump’s nominee to head the Department of Health and Human Services, none worries US public-health experts more than his embrace of the anti-vaccine movement. If he assumes the position, he could influence the leadership of agencies in charge of approving, recommending and distributing vaccines in the US. Plus, Kennedy, who emerged as one of the leading voices in the anti-vaccine movement during the Covid-