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The problem
Intervention: Integration of polio vaccination campaign workers to conduct door-to-door visits identifying and reaching children aged 12-23 months missing routine vaccinations, with immunization status data integrated into electronic health systems for targeted EPI staff follow-up
Who it was tested with: Children aged 12-23 months in urban Lahore, Pakistan, particularly in underserved urban slums and low socio-economic areas.
The same group is measured before the intervention and again afterwards, with a baseline and an endline and sometimes a midline. Change is visible, but other causes cannot be ruled out.
"A special outreach strategy engaged polio vaccination teams to conduct door-to-door visits of children aged 12-23 months, recording each child's routine immunization status. These data were integrated into the electronic health system and provided to Expanded Programme on Immunization (EPI) staff for targeted follow-up." The pre-post design with surveys before and after intervention implementation allows comparison of coverage changes, though without a comparison group the causal attribution remains uncertain.
No control group was included in the study design, limiting causal inference. The improvements occurred during broader post-COVID-19 recovery of immunization services, making it unclear how much improvement resulted specifically from the intervention versus general service recovery.
Across countries and designs
1 study · 1 country
