One expert who studies emerging infectious diseases called Kennedy's past tweets and remarks about the HPV vaccine "complete fabrication." Here's why.

An upcoming meeting of the ACIP, a key CDC vaccine advisory panel that is under scrutiny by RFK Jr., has been postponed. A U.S. official said it would be rescheduled.

The federal health department escalated the Trump administration’s campaign against transgender protections Wednesday, releasing public guidance that asserts a person’s sex is “unchangeable” and launching a website that promotes orders aimed at transgender people.

Kennedy tried to hold out an olive branch to the researchers during his introductory remarks and pledged transparency.