A senior scientist at the U.S. Centers for Disease Control and Prevention has resigned, warning that changes in leadership may weaken the country's vaccine program.

Health and Human Services Secretary Robert F. Kennedy Jr. announced Monday that he is dismissing all 17 members of the Advisory Committee on Immunization Practices (ACIP), a key panel that guides national vaccine policy.

A Seattle infectious disease doctor, whose work was pivotal early in the COVID pandemic, shares more on her experience with the country's top vaccine advisory group. “We look at the data and we make decisions based on the data.