Largest Catch-Up Initiative Accelerates Global Vaccination Coverage

Industry Insights from Next Move Strategy Consulting

As global health systems continue to recover from pandemic-driven disruptions, the completion of the “Big Catch-Up” initiative marks a significant milestone in the Vaccines Market. Launched during World Immunization Week 2023, the multi-year effort has delivered over 100 million vaccine doses to an estimated 18.3 million children across 36 countries, demonstrating the scale and urgency of addressing immunization gaps worldwide.

A Landmark Effort to Restore Immunization Coverage

The Big Catch-Up initiative was designed to counter the sharp decline in routine immunization caused by the COVID-19 pandemic. Between 2023 and 2025, the programme successfully reached millions of children aged 1 to 5, including approximately 12.3 million “zero-dose” children who had never received any vaccines and 15 million who had not been vaccinated against measles.

In addition to routine immunization recovery, the initiative delivered 23 million doses of inactivated polio vaccine, reinforcing global eradication efforts. With implementation concluding in March 2026, the programme is on track to meet its broader target of reaching at least 21 million un- and under-immunized children.

Bridging the Vaccine Equity Gap

A core objective of the initiative was to address disparities in vaccine access, particularly in underserved and conflict-affected regions across Africa and Asia. These 36 participating countries account for nearly 60% of zero-dose children globally, highlighting the scale of the challenge.

The programme introduced systemic improvements by strengthening routine immunization frameworks and extending outreach beyond infancy. For the first time, countries leveraged existing healthcare systems to identify and vaccinate older children who had previously been missed, while also updating policies and training healthcare workers to improve coverage tracking and delivery.

Several countries reported notable progress. Ethiopia reached over 2.5 million zero-dose children with essential vaccines, while Nigeria successfully immunized around 2 million previously unvaccinated children. Across multiple regions, expanded community engagement and health system coordination played a critical role in scaling these efforts.

Strengthening Systems for Long-Term Impact

Beyond immediate vaccination gains, the initiative catalyzed long-term improvements in immunization infrastructure. Enhanced screening, monitoring systems, and community outreach strategies have positioned participating countries to sustain higher vaccination coverage in the future.

Despite these achievements, global health agencies emphasize that catch-up campaigns alone cannot replace strong routine immunization programmes. In 2024, an estimated 14.3 million infants still missed receiving a single vaccine, underscoring persistent systemic gaps.

Rising Risks Highlight Need for Sustained Efforts

The consequences of these immunization gaps are becoming increasingly evident. Measles outbreaks are rising globally, with approximately 11 million cases reported in 2024 and a significant increase in the number of countries experiencing large-scale outbreaks since 2021.

Health organizations stress that while large-scale catch-up initiatives are effective in closing short-term gaps, sustained investment in routine immunization remains the most reliable and cost-effective strategy to prevent disease outbreaks and ensure long-term protection.

Global Collaboration Drives Momentum

The success of the Big Catch-Up reflects coordinated action among governments, global health organizations, and community stakeholders. The initiative is being recognized as the largest international effort to reach missed children with life-saving vaccines, showcasing the impact of unified global health strategies.

As part of World Immunization Week 2026, global agencies are reinforcing the message “For every generation, vaccines work,” calling for continued expansion of immunization coverage across all age groups. The focus remains on reaching zero-dose children and strengthening equity in the most vulnerable populations.

According to Next Move Strategy Consulting

The successful execution of the Big Catch-Up initiative is expected to significantly influence the Vaccines Market by accelerating demand for large-scale immunization programmes and reinforcing investments in public health infrastructure. The emphasis on reaching zero-dose populations and strengthening routine immunization systems is likely to drive long-term growth, particularly in emerging economies with underserved populations.

Furthermore, the integration of systemic improvements—such as enhanced tracking, expanded outreach, and workforce training—signals a shift toward more resilient and scalable vaccination frameworks. This trend is expected to shape future market strategies, with stakeholders prioritizing accessibility, equity, and sustained immunization coverage as key growth drivers.

Advancing Toward a Resilient Immunization Future

The Big Catch-Up initiative underscores the critical role of vaccines in safeguarding global health. While significant progress has been made, the path forward requires consistent investment, strengthened health systems, and continued global collaboration to ensure that no child is left behind.

Source: WHO

Prepared By: Next Move Strategy Consulting