CDC

"After a scientific review of the underlying science, comparing the U.S. child and adolescent immunization schedule with those of peer, developed nations, Centers for Disease Control and Prevention Acting Director Jim O’Neill has updated the U.S. childhood immunization schedule."https://www.hhs.gov/press-room/fact-sheet-cdc-childhood-immunization-recommendations.html?user_id=66c4c92f5d78644b3ac5d5b4