Health and Human Services Secretary Robert F. Kennedy Jr., a longtime anti-vaccine conspiracy theorist, will now require placebo testing for “all new vaccines.” “All new vaccines will ...

Health and Human Services Secretary Robert F. Kennedy Jr. intends to shift the way vaccines are tested, a move that the agency said will increase transparency but that medical experts fear could ...

The administration will require all new vaccines to be tested against an inert substance known as a placebo before they can be made available, which is a "radical departure from past practices," ...

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.