GENEVA, Switzerland — Global childhood vaccination levels have stalled, leaving millions more children un- or under-vaccinated than before the pandemic, the UN said Monday, warning of dangerous coverage gaps enabling outbreaks of diseases like measles.

In 2023, 84 percent of children, or 108 million, received three doses of the vaccine against diphtheria, tetanus and pertussis (DTP), with the third dose serving as a key marker for global immunization coverage, according to data published by the UN health and children's agencies.