Infectious morbidity; military epidemiology; epidemiological surveillance; risk assessment; short-term forecasting; syndromic surveillance; laboratory monitoring; person-days.
Authors:AbstractBackground: Infectious morbidity in organized military units remains an important cause of medical losses and operational disruption. Stable daily contacts, shared accommodation, collective training, transport, catering facilities, and sanitary zones create conditions in which even mild infections may rapidly acquire group-level significance. Objective: This study aimed to substantiate modern epidemiological, clinical, and laboratory approaches to the assessment of infectious morbidity in military units and to develop a short-term risk-based forecasting framework for differentiated preventive decision-making. Methods: The proposed approach is based on weekly unit-level assessment using incidence per 1,000 person-days, outbreak activity, clinical severity, hospitalization patterns, laboratory verification, and lost duty days. Environmental, organizational, clinical, and laboratory risk indicators were considered, including ventilation, housing density, vaccination coverage, timeliness of medical consultation and isolation, hand hygiene, sanitary conditions, and evidence of repeated pathogen detection. Forecasting methods included syndromic surveillance, regression-based models, countdata approaches, gradient boosting comparison, calibration assessment, Brier score analysis, and decision curve evaluation. Results: The article identifies a methodological gap between fragmented medical, laboratory, sanitary, and organizational data and the need for an integrated weekly surveillance system. A seven-day forecast horizon and risk-category-based reassessment model are proposed, allowing low-risk units to remain under routine weekly monitoring while moderate, high, and critical categories require accelerated reassessment and intensified preventive action. Conclusion: A unit-week risk assessment model can strengthen early warning, improve the timing of preventive measures, and reduce the gap between epidemiological signals and practical military medical decisions.
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