But earlier this year, Secretary Kennedy fired and replaced every member of the vaccine advisory panel that guides the CDC by developing recommendations on how vaccines are used in the U.S. Doctors and vaccine scientists were alarmed - like Allison Kempe. ALLISON KEMPE: There’s now going to be much more confusion and distrust of vaccines among the public. DALEY: Kempe is a professor of pediatrics at the University of Colorado who served on that advisory panel years ago.