WASHINGTON — A key Senate health leader is calling for this week’s meeting of the panel of vaccine advisers handpicked by Health and Human Services Secretary Robert F. Kennedy Jr. to be delayed, citing their lack of experience and potential bias against some vaccines.

The GOP senator objected to Secretary Kennedy's recasting of the influential advisory panel, which has sparked criticism from medical groups and Democratic lawmakers.

The Senate health committee chairman said new members of a key advisory panel who were appointed by Robert F. Kennedy Jr. “lack experience.”