The US Food and Drug Administration will require all new vaccines to undergo placebo-controlled trials before approval — a policy shift that could reshape how immunizations are developed.

Former government health officials fear the Trump administration is moving to slow-walk vaccine approvals, including by imposing new regulatory hurdles on drugmakers, such as changing the requirements for approval or seeking additional clinical trial data.

Per the Post, which first reported the story, “‘All new vaccines will undergo safety testing in placebo-controlled trials prior to licensure — a radical departure from past practices,’ an HHS spokesperson told The Washington Post in response to questions about Kennedy’s comments on the measles vaccines and general vaccine policy."