IBSC Certified Designated Infection Control Officer (DICO-C) Certification Practice Exam 2026 – Your All-in-One Guide to Exam Success!

The official adult immunization schedules are determined by ACIP and endorsed by the CDC. ACIP is a federal advisory committee that reviews vaccine safety and effectiveness and makes recommendations on how vaccines should be used in different populations, including adults. When ACIP approves a recommendation, the CDC formally endorses it and publishes the official adult immunization schedule that clinicians follow. The World Health Organization provides international guidelines but does not set a national schedule. The FDA approves vaccines for safety and labeling but does not decide when they should be given. The NIH conducts research and informs guidelines, but it does not publish the official immunization schedule. So the best answer is ACIP with CDC endorsement.