 New stats are out on the number of children around the world who are up to date on their shots. The World Health Organization and UNICEF analyzed vaccination data from over 190 countries annually and found for 2023, things were pretty much the same as 2022. A total of 21 million children are missing one or more vaccines globally at this very moment. Dr. Ephraim Lamongos, the chief of immunization at UNICEF.