Why the study?
While environmental surveillance (ES) is promising for early pathogen detection, the influence of the spatial arrangement of ES sites on early detection remains unclear.
Population
Simulated unimmunised children aged under 5 years old in South Africa
Comparison
Six scenarios combining three importation risk distributions with two ES site layout strategies
Design
Stochastic meta-population simulation-based study
Authors
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Highlights incomplete coverage requiring attention; leaves open determinants of dropout in South African children.
This nationally representative survey provides critical data on immunization coverage in South Africa, demonstrating that 76.8% of children are fully vaccinated by 18 months of age.
Asakura et al. (2025) studied this question.
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