New data released by the World Health Organization and UNICEF show that in 2024, 89% of infants received at least one diphtheria-tetanus-pertussis (DTP) vaccine dose, while 85% completed the full three‑dose course. Yet behind these figures lies a critical concern: 14.3 million infants received no routine vaccines at all, remaining completely unprotected against preventable diseases. These “zero‑dose” children threaten to reverse decades of progress in global child health. Most of these cases are concentrated in conflict-affected and low-resource settings, raising serious alarms among global health leaders.

 The Scope of the Problem  

  • Approximately 115 million infants received at least one DTP dose, and 109 million completed all three doses, which is just a modest gain from 2023.
  • Yet nearly 20 million infants missed at least one DTP dose, which includes the 14.3 million zero‑dose children—4 million more than the 2024 Immunization Agenda 2030 target.
  • These zero‑dose cases are largely concentrated in just 26 fragile or conflict-affected countries, which collectively account for 50% of all children with no vaccinations.

Where the Zero-Dose Focus Fell Short

Zero-dose surveillance   is weakest where it's needed most:

  • Many affected countries lack subnational monitoring, making it harder to target outreach.
  • Stigma, misinformation, and distrust prevent caregivers from seeking vaccines.
  • Supply chain problems and fragmented health systems lead to missed coverage in rural or conflict zones.

U.N. experts have said that access to vaccines remained “deeply unequal” and that conflict and humanitarian crises quickly unraveled progress; Sudan had the lowest reported coverage against diphtheria, tetanus, and whooping cough. The data showed that nine countries accounted for 52% of all children who missed out on immunizations entirely: Nigeria, India, Sudan, Congo, Ethiopia, Indonesia, Yemen, Afghanistan, and Angola.

Why This Matters

DTP3 coverage is a global benchmark for routine immunization strength. While 85% is stable, it still falls short of the 95% targets necessary for herd immunity, leaving millions vulnerable to diphtheria, tetanus, and pertussis.

The persistent zero-dose rate signals deep health access inequity: conflict zones, supply interruptions, insufficient outreach, and misinformation remain core barriers.

Small Gains Aren’t Enough

  •  In 2024, 1 million more infants completed the full DTP series, and about 171,000 more received at least one dose than in the previous year. These are positive signs, but not enough to close the zero-dose gap.
  •  Meanwhile, the number of measles-first-dose recipients rose slightly to 84%, still below the 2019 benchmark of 86%. 
  • The Expanded Programme on Immunization estimates that vaccines have saved 154 million lives since 1974, cutting global infant mortality by nearly 40%. But with 14.3 million children still left out, those gains remain at risk.

The bottom line: improvement exists, but progress is too slow and uneven.

Disparities in Coverage

  • Even before the pandemic, rising zero-dose numbers were observed, but fragile settings amplified the problem. In half of the affected countries, unvaccinated children increased from 3.6 million in 2019 to 5.4 million in 2024. 
  • Only 17 out of 64 countries with DTP1 coverage below 90% in 2019 have improved since then. Meanwhile, 47 other countries saw coverage stall or decline.

Why Coverage Plateaued 

WHO Director-General Tedros Adhanom Ghebreyesus warned that: “Drastic cuts in aid, coupled with misinformation about the safety of vaccines, threaten to unwind decades of progress.”

Three key factors prevented progress:

  1. Conflict and instability disrupted vaccine delivery in war zones and humanitarian crises.
  2. Funding shortfalls following aid cuts, especially from the U.S., starved immunization programs of resources.
  3. Vaccine misinformation—some promoted by influential figures —eroded public trust in vaccination.

Why It Matters: Stakes Are High

Global immunization coverage may look stable, but it hides a critical weakness. According to the WHO, after stagnating at 84%, efforts have barely nudged higher. Persistent zero‑dose figures signal widening health inequality and future outbreaks.

Furthermore, vaccines are one of the most effective public health tools in preventing millions of deaths annually. But stagnant global coverage and persistent zero‑dose gaps threaten to reverse these gains. Without real momentum, outbreaks of measles, polio, and other diseases remain risks.

"We've hit this very stubborn glass ceiling, and breaking through that glass to protect more children against vaccine-preventable diseases is becoming more difficult," WHO's director of the Department of Immunization, Vaccines and Biologicals, Kate O'Brien,  told reporters.

What Needs to Change

UNICEF Executive Director Catherine Russell emphasized: “Closing the immunization gap requires a global effort with governments, partners, and local leaders investing in primary health care and community workers.”

WHO and UNICEF are urging governments and partners to:  

  • Close the funding gap for Gavi's 2026–2030 plan to protect children in low-income countries.
  • Strengthen immunization efforts in conflict zones to reach zero-dose children and stop disease outbreaks.
  • Prioritize local strategies and boost domestic investment to make immunization part of routine primary health care.
  • Tackle vaccine misinformation and increase uptake using evidence-based communication.
  • Improve data and disease tracking systems to make immunization programs more effective.

Spotlight on Progress 

Some wins exist, though:  

  • HPV vaccine coverage rose internationally: from 20% to 27% among girls, thanks to momentum in Gavi-supported nations.
  • Measles-first-dose coverage rose modestly to 84%, second-dose to 76%. But both are still below the 95% needed for reliable herd immunity.

Final Insight

Global vaccine numbers are stable, but not enough. The persistence of 14.3 million zero‑dose infants reveals a hidden weakness in global health systems. It shows the risk of outbreaks persists, and equity in healthcare remains out of reach. Stability is not progress unless every child has access to vaccinations. This means there must be real investment in fragile systems, better tracking, and courageous leadership. Anything less leaves progress undone. Global leaders must choose action over complacency if immunization gains are to be sustained.