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The problem
Intervention: Pneumococcal conjugate vaccination (PCV)
Who it was tested with: Children treated at University Children's Hospital Belgrade, 2019-2024 (69 children total).
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.
"Statistical analysis included chi-square (χ2) tests, odds ratios (ORs) with 95% confidence intervals, and multivariable logistic regression." The study used statistical comparison between vaccinated and unvaccinated groups with adjusted odds ratios to isolate the protective effect of vaccination on pneumonia complications.
Single-centre retrospective study with small sample size; unable to establish causality or control for all confounding variables; vaccination coverage and timing not fully specified.
Across countries and designs
12 studies · 20 countries
