Global vaccination coverage for the first dose of the diphtheria, tetanus, and pertussis (DTP) vaccine hit 90 per cent last year. Yet, the milestone masks a stark reality: millions of children remain unprotected. According to the latest WHO-UNICEF Estimates of National Immunization Coverage, only 85 per cent of infants completed the full three-dose series, leaving global rates stalled below pre-pandemic levels.
Millions of Children Left Behind
The most alarming statistic remains the millions of “zero-dose” children who missed every essential vaccine during their first year of life. These children are primarily concentrated in regions defined by conflict, fragility, and crumbling health infrastructure.
“Governments and health workers have helped global vaccination rates bounce back after dropping significantly during the COVID-19 pandemic,” said UNICEF Executive Director Catherine Russell. While some recovery has occurred since the pandemic, the persistence of this zero-dose population suggests that many regional health systems have failed to regain their functionality.
Measles Immunity Falling Short
Measles serves as a barometer for the health of global immunization programs. Because the virus is so highly transmissible, the WHO requires high coverage with two doses to prevent outbreaks. Current data shows global uptake is nowhere near that threshold: only 84 per cent of children received their first dose, and a mere 77 per cent received the second.
The consequences are immediate. Last year, 57 countries reported major measles outbreaks, a direct result of falling short of universal coverage targets.
The Triple Threat to Progress
The uneven recovery of immunization services is being stifled by three core pressures:
Conflict and Instability: More than half of all zero-dose children reside in fragile or conflict-affected settings, where broken supply chains and safety risks prevent health workers from reaching populations.
Vaccine Hesitancy: A rising tide of hesitancy is affecting both high- and middle-income nations. Coupled with waning political commitment, this skepticism has caused coverage to slide even where vaccines remain affordable and accessible.
Funding Constraints: International health financing has seen recent cuts. The WHO and UNICEF warn that without sustained investment, the modest gains of the last year could evaporate, leaving millions more at risk.
The Surveillance Blind Spot
Compounding these challenges is a lack of data. Fewer countries conducted comprehensive national immunization surveys in 2025, leaving global health bodies struggling to pinpoint specific pockets of unvaccinated children.
WHO Director-General Tedros has described vaccines as one of the most effective and equitable public health interventions available. To stop the backsliding, the WHO and UNICEF are calling on governments to prioritize funding for disease surveillance and to aggressively counter the misinformation eroding public trust.
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