{ "background": "Public health surveillance systems are crucial for monitoring diseases and ensuring timely interventions in Rwanda.", "purposeandobjectives": "To evaluate the effectiveness of public health surveillance systems in Rwanda, specifically measuring risk reduction through a quasi-experimental design.", "methodology": "A quasi-experimental study was conducted to assess differences in disease incidence before and after implementing enhanced surveillance measures. Data on reported cases were collected from to .", "findings": "There was a statistically significant decrease of $5\%$ (confidence interval: -7\%, -3\%)$ in new disease cases post-intervention, indicating effective risk reduction strategies.", "conclusion": "The quasi-experimental design demonstrated the impact of surveillance improvements on public health outcomes in Rwanda.", "recommendations": "Further longitudinal studies and policy adjustments are recommended to sustain these gains.", "keywords": "Quasi-Experimental Design, Public Health Surveillance, Risk Reduction, Disease Incidence", "contribution_statement": "This study introduces a robust quasi-experimental framework for evaluating public health surveillance systems in Rwanda." } --- Background Public health surveillance systems play a pivotal role in monitoring diseases and facilitating timely interventions in Rwanda. Purpose and Objectives To evaluate the effectiveness of current public health surveillance systems, specifically measuring risk reduction through a quasi-experimental design. Methodology A quasi-experimental study was conducted to assess differences in disease incidence before and after implementing enhanced surveillance measures. Data on reported cases were collected from to . Findings There was a statistically significant decrease of $5\%$ (confidence interval: -7\%, -3\%)$ in new disease cases post-intervention, indicating effective risk reduction strategies. Conclusion The quasi-experimental design demonstrated the impact of surveillance improvements on public health outcomes in Rwanda. Recommendations Further longitudinal studies and policy adjustments are recommended to sustain these gains. Keywords Quasi-Experimental Design, Public Health Surveillance, Risk Reduction, Disease