The Advisory Committee on Immunization Practices (ACIP), restructured by Health and Human Services Secretary Robert F. Kennedy Jr., postponed the vote on whether to delay the hepatitis B vaccine for certain newborns. Members raised questions about the safety, effectiveness, and timing of the vaccine, which is currently recommended within 24 hours after birth to prevent mother-to-infant transmission. Debate centered on prenatal screening adequacy and potential risks, leading to a temporary shelving of the decision pending further data review.