Kennedy Jr.'s installation atop the nation’s health bureaucracy. The Advisory Committee on Immunization Practices (ACIP) normally holds multiple meetings a year, reviews scientific data and makes recommendations to the director of the Centers for Disease Control.

A Centers for Disease Control and Prevention vaccine advisory committee meeting scheduled for next week — the first since Health and Human Services Secretary Robert F. Kennedy Jr. was sworn in — has been postponed, a senior HHS official said Thursday.

Health and Human Services officials said the postponement was to accommodate public comment ahead of the meeting but experts decried the delay.