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,

Robert F. Kennedy Jr, the United States’ top public health official, recently claimed some religious groups avoid the measles, mumps and rubella (MMR) vaccine because it contains “ aborted fetus debris ” and “DNA particles”.

The Department of Health and Human Services says it will require new vaccines to be tested against a placebo, which could complicate and delay Food and Drug Administration approval of many vaccines.