Health Secretary Robert F. Kennedy Jr.'s push to reshape vaccine policy will hit a crescendo on Thursday, when his handpicked advisory panel is expected to consider limiting the availability of MMR, hepatitis B and COVID-19 shots.

Why it matters: The Advisory Committee on Immunization Practices (ACIP) traditionally operates on scientific consensus and makes recommendations to the director of the Centers for Disease Control and Prevention. • But Kennedy's summertime purge of the committee — and the lack of a full-time political leader at the agency — has many in the scientific community convinced that the new appointees will rubber-stamp more limits on who can get routine shots.

What they're saying: "ACIP has quite literally been the north star of America's approach to vaccination for d

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