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Geographic Information Systems (GIS) play a crucial role in disease surveillance and in understanding the spread of chronic diseases by integrating spatial data with health information. GIS enables the collection, storage, analysis, and visualization of geographically referenced health data, which helps public health authorities identify patterns, trends, and risk factors associated with diseases. By linking disease occurrence with location-based variables such as population density, environmental conditions, and access to healthcare facilities, GIS supports evidence-based decision-making and effective intervention planning. In disease surveillance, GIS is widely used _____ __________ ___ ____ _______.
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