13.5M Zero-Dose Kids in 2025: UN Warns of Immunization System Cracks

The United Nations has issued a stark warning about persistent and deepening cracks in the global immunization system, despite marginal gains in infant vaccination coverage in 2025. Data from the World Health Organization and UNICEF reveals that 90 percent of infants globally—nearly 116 million—received at least one dose of the diphtheria, tetanus, and pertussis (DTP) vaccine last year, up one percentage point from 2024 and four points since 2021. Completion of the full three-dose DTP series climbed to 85 percent. Yet both metrics remain one point below pre-pandemic 2019 levels, signaling that the system has not fully recovered from the disruption caused by COVID-19. More troubling, 13.5 million children received no vaccines at all in their first year—the so-called zero-dose children—a figure that, while 750,000 lower than in 2024, still represents a vast reservoir of vulnerability. The UN’s overriding concern is not just the absolute number of unprotected children, but the trend of those who start on the vaccine schedule but drop out before completing it, a problem concentrated in poorer countries. An estimated 7.3 million infants received the first DTP dose but did not go on to receive a measles vaccine, typically given between nine and twelve months of age. This drop‑out rate has contributed to measles coverage stalling at 84 percent for the first dose and 77 percent for the second, far short of the 95 percent threshold needed to prevent outbreaks of the highly contagious disease. WHO’s vaccines director, Kate O’Brien, explicitly linked the dropouts to misinformation circulating about measles vaccination, calling the phenomenon a matter of “very significant concern.” The data underscores a triple threat to global immunization: drastic funding cuts, armed conflicts that disrupt healthcare delivery, and the pervasive spread of false information that erodes parental trust. While the 13.5 million zero-dose figure is an improvement over 2024, the lingering gap indicates that progress is fragile and that millions of children remain at risk of preventable diseases. The measles numbers are particularly alarming because the virus moves quickly to exploit any drop in herd immunity; in 2025, coverage was already insufficient to halt chains of transmission. The UN’s message is clear: without concerted international action to close funding gaps, improve vaccine access in conflict zones, and combat misinformation with science-based communication, outbreaks will continue to surge. The slight uptick in DTP coverage may create a false sense of security, but it masks the deeper structural weaknesses that, if not addressed, could undo decades of hard-won gains in child survival. Looking ahead, the world faces a critical choice: invest now in strengthening routine immunization systems or pay a higher price later in lives lost and healthcare systems overwhelmed by vaccine-preventable epidemics.