In a sweeping ruling, a single district judge blocks policy changes, elevates an advisory committee to gatekeeper status, and locks federal health policy in place A federal district judge in Boston has issued a sweeping order halting major changes to federal vaccine policy. In a single ruling, the court blocked the CDC’s revised immunization schedule, invalidated the newly reconstituted Advisory Committee on Immunization Practices (ACIP), and voided every action taken by that committee. This decision is being framed as a procedural correction. It is not. It is a substantive intervention that freezes an elected administration’s policy direction and replaces it...