The Big Catch-up Reaches Millions Of Children With Life-saving Vaccines

The Big Catch-Up (BCU), a historical multi-year, multi-country effort to reside vaccination declines driven mostly by nan COVID-19 pandemic, has reached an estimated 18.3 cardinal children aged 1 to 5 crossed 36 countries pinch much than 100 cardinal doses of life-saving vaccines, helping to constrictive captious immunity gaps, announced Gavi, nan Vaccine Alliance (Gavi), WHO, and UNICEF astatine nan commencement of World Immunization Week.

Of nan 18.3 cardinal children reached betwixt 2023 and 2025, an estimated 12.3 cardinal were "zero-dose children" who had not yet received a vaccine and 15 cardinal had ne'er received a bales vaccine. BCU besides provided 23 cardinal doses of inactivated polio vaccine (IPV) to un- and under-vaccinated children, an basal involution to scope polio eradication. Programme implementation concluded connected 31 March 2026. Although last information is still being compiled, nan world inaugural is forecasted to beryllium connected way to meet its target of reaching astatine slightest 21 cardinal un- and under-immunized children.

However, agencies pass that while catch-up vaccination is an important strategy for closing immunization gaps, expanding nan scope of regular immunization programs remains nan astir effective and sustainable measurement to protect children and forestall outbreaks of vaccine-preventable diseases.

Addressing nan vaccine equity gap

Beyond pandemic recovery, nan BCU inaugural focused connected closing nan vaccine equity gap. Millions of children each twelvemonth miss nan basal vaccinations they should person earlier nan property of one. Most of them unrecorded successful fragile, conflict-affected, aliases underserved communities and are ne'er caught up arsenic they turn older.

The 36 participating BCU countries crossed Africa and Asia presently relationship for 60% of each zero-dose worldwide. Pandemic-related immunisation programme disruptions exacerbated this issue, and, successful these countries, added millions much zero-dose children to those who already chronically miss out. To reside this issue, nan Big Catch-Up looked beyond babe immunization, for nan first-time ever systematically leveraging regular immunization systems to make heavy inroads into nan accumulated world cohort of older children betwixt nan ages of 1 to 5 – "older" because they should person received captious regular vaccines earlier nan property of 1 – who stay susceptible owed to missed vaccinations.

BCU catalyzed long-lasting systems to identify, screen, vaccinate and show sum rates successful these older children – including updates to policies connected property eligibility. Countries besides oriented and trained wellness workers to identify, surface and vaccinate missed children arsenic portion of regular attraction and engaged pinch communities and civilian nine to support catch-up efforts. By expanding nan scope of immunization to millions of antecedently missed children and their communities, and investing successful systemic improvements, nan BCU thrust has made it easier for nan countries to guarantee these populations and others for illustration them proceed to person basal wellness and immunization services successful nan future.

Among nan participating countries, 12 countries (Burkina Faso, Democratic People's Republic of Korea, Ethiopia, Kenya, Madagascar, Mauritania, Niger, Pakistan, Somalia, Togo, United Republic of Tanzania, and Zambia) reported reaching much than 60% of each zero-dose children nether nan property of 5 who had antecedently missed DTP1. In Ethiopia, much than 2.5 cardinal antecedently zero-dose children received DTP1. The state besides delivered astir 5 cardinal doses of IPV and much than 4 cardinal doses of bales vaccine, among different cardinal vaccines, to un- and under-vaccinated children. Countries extracurricular this group besides reached ample numbers of children. In Nigeria, for example, 2 cardinal antecedently zero-dose children were reached pinch DTP1, and 3.4 cardinal doses of IPV were administered alongside millions of doses of different vaccines.

While these 36 countries received Gavi backing and method assistance from WHO and UNICEF done BCU, galore different countries besides implemented activities during this play to accelerate efforts to catch-up missed children and retrieve immunisation services pursuing pandemic-related backsliding.

"As nan largest ever world effort to scope missed children pinch life-saving vaccines, nan Big Catch-Up shows what is imaginable erstwhile governments, partners and communities activity together to protect nan astir susceptible successful society," said Dr Sania Nishtar, CEO of Gavi, nan Vaccine Alliance. "Thanks to this accomplishment, not only are millions of children now protected from preventable diseases but truthful are their communities, for generations to come." 

By protecting children who missed retired connected vaccinations because of disruptions to wellness services caused by COVID-19, nan Big Catch-Up has helped to undo 1 of nan pandemic's awesome antagonistic consequences. The occurrence of nan Big Catch-Up is simply a testament to wellness workers and nationalist immunization programmes, which are now amended equipped to find and vaccinate children missed by regular services."

Dr. Tedros Adhanom Ghebreyesus, Director-General, World Health Organization

"Vaccinations prevention lives," said UNICEF Executive Director Catherine Russell. "This inaugural shows what's imaginable erstwhile countries person nan resources, tools, and governmental will to scope children pinch lifesaving vaccines. We've caught up pinch immoderate of nan children who missed regular vaccinations during nan pandemic – but galore much stay retired of reach. The gains made done nan Big Catch-Up must beryllium sustained done finance successful strong, reliable immunisation systems, particularly astatine a clip wherever bales is resurging."

Looking astatine nan challenges ahead

Through nan Big Catch-Up, for nan first clip ever, countries and world partners successfully reached 12.3 cardinal "older" zero dose children betwixt nan ages of 1 to 5. However, successful 2024, an estimated 14.3 cardinal infants nether nan property of 1 globally grounded to person a azygous vaccine done regular immunization programmes. Despite BCU demonstrating advancement is imaginable pinch activity and targeted finance and support, lowering this yearly number of infants who miss retired will require building systems that consistently scope nan hardest to scope communities – against a backdrop of rising commencement cohorts, conflict and displacement, backing cuts, and strained wellness systems.

The consequences of chronic gaps successful regular immunisation are plain to see. Measles outbreaks, for example, are rising successful each region pinch astir 11 cardinal cases successful 2024, and nan number of countries facing ample outbreaks has almost tripled since 2021. This surge is driven by persistent gaps successful bales vaccination done regular immunization programmes, compounded by declining vaccine assurance successful immoderate antecedently high-coverage communities.

Large-scale catch-up efforts are assets intensive and should service only arsenic a gap-filling measurement that is complementary to regular immunization. Timely vaccination according to nationalist immunisation schedules provides optimal protection and continues to beryllium nan astir sustainable measurement to safeguard children and communities.

For each generation, vaccines work

WHO, UNICEF, and Gavi, on pinch countries and communities, are marking World Immunization Week (24–30 April 2026) pinch a associated campaign, "For each generation, vaccines work," calling connected countries to prolong and grow vaccination sum astatine each age. At nan midpoint of nan Immunisation Agenda 2030 (IA2030), and cardinal to Gavi's 2026–2030 strategy (Gavi 6.0), nan privilege remains nan same: reaching zero-dose children and advancing equity successful nan hardest-to-reach communities, peculiarly successful countries grappling pinch conflict, instability, aliases vulnerable wellness systems. Maintaining that momentum will require expanding semipermanent home investments successful immunization programmes and reliable commitments from partners and donors.