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The problem
Intervention: Current routine immunization programme with scheduled vaccinations delivered through health workers with Infant Welfare Cards for documentation
Who it was tested with: Children aged 24-35 months in urban Western Region 1, The Gambia.
Experience from people who deliver programmes: stories, case studies and lessons learned. Valuable for understanding how and why, and for spotting what to test next, but not a measure of effect.
"A cross-sectional quantitative study was conducted among children in Western Region 1 (urban Gambia). A multi-stage cluster sampling method was employed, based on the WHO 30 X 7 cluster survey approach. Vaccinations were categorized as 'early', 'timely', or 'delayed' based on accepted vaccination windows as defined by the Gambia Expanded Program on Immunization (EPI)." This design documents coverage and timeliness against a defined standard but cannot isolate programme effectiveness from other factors affecting vaccination timing.
Cross-sectional design captures only a snapshot without comparison group or control; does not identify causal factors for delays; limited to urban areas and one age cohort; relies on vaccination cards which may be incomplete or lost
Across countries and designs
11 studies · 7 countries
