By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered: Section 1 .   Purpose and Policy.   Pursuant to the Presidential Memorandum of December 5, 2025 (Aligning United States Core Childhood Vaccine Recommendations with Best Practices from Peer, Developed Countries) (Memorandum), the Department of Health and Human Services (HHS) completed a scientific assessment that compared United States childhood immunization recommendations with those of peer nations, analyzed vaccine uptake and public trust, evaluated clinical and epidemiological evidence and knowledge gaps, and examined vaccine mandates (scientific assessment).  The scientific assessment found that the United States currently recommends more childhood vaccines than any peer nation, including more than twice as many vaccine doses as some European nations, and identified a set of consensus vaccines that are consistently recommended in all peer countries.…