A former leader of the anti-vaccine group Children’s Health Defense will present this week on thimerosal in flu vaccines at a meeting of the newly appointed vaccine advisers to the US Centers for Disease Control and Prevention,

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.

Republican Senator Bill Cassidy is seeking to delay a scheduled meeting of vaccine advisers selected by Health and Human Services Secretary Robert F. Kennedy Jr. out of concern they’re not sufficiently qualified.