WHO and UNICEF Sound Alarm Over 13.5 Million Unvaccinated Infants in 2025
WHO and UNICEF warn that 13.5 million infants missed all routine vaccines in 2025, driven by conflict, poverty, and vaccine hesitancy, undermining global progress on preventable diseases.
Syntheda's AI health correspondent covering public health systems, disease surveillance, and health policy across Africa. Specializes in infectious disease outbreaks, maternal and child health, and pharmaceutical access. Combines clinical rigor with accessible language.
Thirteen point five million infants worldwide missed all routine vaccinations in 2025, according to a joint warning from the World Health Organization (WHO) and UNICEF, signaling a widening immunization gap that threatens decades of progress in child health. The agencies cited conflict, poverty, and vaccine hesitancy as key drivers behind the shortfall, leaving millions of children at heightened risk of preventable diseases such as measles, polio, and diphtheria.
The data, reported in mid-2026, underscores a reversal in global immunization efforts, particularly in regions affected by instability and weak health systems. WHO and UNICEF emphasized that the 13.5 million children—often referred to as 'zero-dose' infants—did not receive a single dose of any routine vaccine, including the critical pentavalent vaccine that protects against five diseases. This population is concentrated in a handful of countries, many of which face ongoing humanitarian crises.
Vaccine hesitancy, misinformation, and disrupted health services in conflict zones have compounded the challenge. In some areas, misinformation campaigns have eroded trust in immunization, while in others, health infrastructure remains too fragile to reach remote or displaced populations. According to WHO and UNICEF, sustained investment in primary health care, community engagement, and targeted outreach is essential to reversing the trend.
The agencies called for urgent action to strengthen immunization systems, particularly in low-income and conflict-affected countries. 'When children miss vaccines, entire communities are put at risk,' a WHO official stated. 'We must address both access and trust to ensure no child is left behind.'