Kennedy Jr., a longtime anti-vaccine conspiracy theorist, will now require placebo testing for “all new vaccines.”“All new vaccines will undergo safety testing in placebo-controlled trials prior to licensure — a radical departure from past practices,

Here are eight possible indicators of how health secretary Robert F. Kennedy Jr. may handle U.S. vaccine policy in coming weeks.

What changes has RFK Jr. enacted so far and what does the future of American health under his leadership look like?