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.

Dr. Levi and Vicky Pebsworth, a nurse affiliated with an anti-vaccine group, voted against recommending clesrovimab; the other five members voted yes. After some confusion, the panel also voted to include the antibody in the children’s vaccine program.