A startling new vision of vaccination in America is becoming clearer — one likely to involve fresh scrutiny of established science and practices, and limits on vaccines that have been studied for decades.

New members of the ACIP began their tenure by shifting the posture of the 60-year-old panel from support for vaccine advancement to doubt.

The Trump administration’s new vaccine advisers endorsed this fall’s flu vaccines for just about every American but threw in a twist: Only use certain shots free of an ingredient antivaccine groups have falsely tied to autism.