Several methods are used in epidemiology for data collection, including: 1. Surveys: Collecting data through questionnaires or interviews. 2. Surveillance Systems: Continuous, systematic collection, analysis, and interpretation of health data. 3. Cohort Studies: Following a group of individuals over time to observe outcomes. 4. Case-Control Studies: Comparing those with a particular condition to those without. 5. Randomized Controlled Trials (RCTs): Assigning participants randomly to receive or not receive an intervention.
