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The problem
Intervention: Multiple implementation research-driven strategies including digital technologies for tracking, improved microplanning and data systems, community engagement through local leaders and volunteers, health system strengthening (cold chain, supervision, workforce capacity), and governance frameworks
Who it was tested with: Infants and children in immunization programs across 13 low- and middle-income countries; 36 implementation research projects.
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 retrospective multiple-case study of 36 IR projects across 13 LMICs, embedded within an evidence review framework and complemented by policy analysis. Data were drawn from systematic document reviews and validation discussions with project leads." The study documents implementation experiences and lessons from multiple real-world projects rather than testing interventions through experimental design, placing it in the practitioner evidence tier.
This is a retrospective synthesis of existing projects rather than a controlled trial. Only 3 of 36 projects directly targeted zero-dose children despite being the stated priority. Specific coverage gain magnitudes are not clearly attributed to individual interventions, and sustainable financing (3.4%) and private-sector engagement (0.9%) received minimal attention, limiting understanding of scalability.
Across countries and designs
1 study · 0 countries
