FDA's top vaccine official forced out, decries RFK Jr.'s "misinformation and lies"

Dr. Peter Marks, the Food and Drug Administration's top vaccine official, was forced to resign Friday, multiple people familiar with the matter told CBS News.

An official with the Department of Health and Human Services delivered an ultimatum to Marks on behalf of HHS Secretary Robert F. Kennedy Jr.: either resign or be fired from his position as director of the Center for Biologics Evaluation and Research, sources said.

"It has become clear that truth and transparency are not desired by the Secretary, but rather he wishes subservient confirmation of his misinformation and lies," Marks wrote of Kennedy in his letter to acting FDA commissioner Sara Brenner. Marks said his resignation would be effective April 5.