( April 27, 2026, 12:53 PM EDT) -- BOSTON — In a challenge by physicians’ professional groups and others to the Centers for Disease Control and Prevention’s changes to vaccine recommendations and the reconstitution of the Advisory Committee on Immunization Practices (ACIP), the federal government moved for a stay of the proceedings pending the resolution of any appeal it might seek of a Massachusetts federal court’s grant of preliminary relief that stayed a January U.S. Department of Health and Human Services memorandum announcing the reduction of the recommended childhood vaccinations from 17 to 11 and the appointment of 13 new ACIP members....