Health and Human Services Secretary Robert F. Kennedy Jr. told agency employees that a commission formed by President Donald Trump will investigate the childhood vaccine schedule.

Kennedy's statements have raised concerns about his childhood vaccine commitment to Republican Senator Bill Cassidy.

A committee of experts that advises the Centers for Disease Control and Prevention is critical in setting national vaccine policy. It's also vulnerable to political interference.

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.

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