Data is fundamental in epidemiology for generating, testing, and validating hypotheses. Sources of data include:
1. Surveillance Systems: Continuous collection, analysis, and interpretation of health data. 2. Health Registries: Databases that systematically collect information on health events. 3. Surveys: Collect data from a sample of individuals to infer patterns in the larger population. 4. Laboratory Data: Provides information on biological markers and other health indicators.
