Case study
The Big Catch-up: Case study of immunization activities in Yemen
This case study examines the implementation of the Big Catch-up (BCU) initiative in Yemen, a strategy designed to address significant gaps in immunization coverage exacerbated by the COVID-19 pandemic and ongoing conflict. The BCU aims to vaccinate children aged 12-59 months who have missed routine doses between 2019 and 2022, restore immunization coverage to 2019 levels, and strengthen routine immunization systems, with a specific focus on zero-dose and under-immunized children.
Authors
Languages
- English
Publication year
2026
Type
Case study
Categories
- Global initiatives
Countries
- Yemen
Tags
- Catch-up
WHO Regions
- Eastern Mediterranean Region
Catch-up reports and briefs
This resource appears in the following Hot Topic page:
The resource is included in the following table:
| Title | Author | Year | Type | Language |
|---|---|---|---|---|
| Real-Time Monitoring Beyond the Big Catch-Up | UNICEF, World Health Organization (WHO), Gavi, the Vaccine Alliance, HealthEnabled | 2025 | Report | English, French |
| The Big Catch-up: Case study of immunization activities in Cameroon | Evidence for Sustainable Human Development Systems in Africa (EVIHDAF) | 2026 | Case study | English |
| The Big Catch-up: Case study of immunization activities in Bauchi and Rivers States, Nigeria | Brooks Insights, Health Policy and Research Group | 2026 | Case study | English |
| The Big Catch-up: Case study of immunization activities in Punjab and Sindh, Pakistan | Center for Economic Research (CERP), Rayn Consulting Group | 2026 | Case study | English |
| The Big Catch-up: Case study of immunization activities in Yemen | Building Foundation for Development, University of Aden, University of Hadramout, Higher Institute of Health Sciences | 2026 | Case study | English |
| The Big Catch-up: Case study of immunization activities in Tanzania | Fausta Michael, Mariam M. Mirambo, Mbonea Mbwambo, Victor Mtaki, Farhat S. Salaeh, Harrison D. Mariki, Domenica Morona, Stephen E. Mshana | 2026 | Case study | English |
| Validating Progress Towards Closing Immunity Gaps in South Sudan - Rapid Convenience Monitoring: Findings and Priority Actions | World Health Organization (WHO), South Sudan Ministry of Health | 2026 | Report | English |
