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The problem
Intervention: Routine vaccination according to national immunization program schedule
Who it was tested with: 4,267 children aged ≤6 years with congenital heart disease in Wuxi, China.
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.
"The medical records of children with CHD who visited grade II and above medical institutions in Wuxi from 2022 to 2023 were collected from the Wuxi Health Information Platform." This is a retrospective analysis of existing medical data without experimental design or comparison group, making it practitioner-level evidence that documents real-world vaccination safety in this population.
Retrospective design without comparison group; limited to one city in China; does not identify reasons for lower non-national vaccine uptake; cannot establish causation between CHD and vaccination outcomes.
Across countries and designs
1 study · 1 country
