Health Secretary Robert F. Kennedy Jr. is getting rid of all members sitting on a key U.S. Centers for Disease Control and Prevention panel of vaccine experts and reconstituting the committee, he said on Monday.

The Advisory Committee on Immunization Practices helps the agency make recommendations on who should get certain vaccines.

The U.S. health secretary chose to “retire” members of a committee that makes significant decisions about who receives immunizations, including the vaccines for children.