Data collection is a critical part of risk assessment and involves multiple sources: - Epidemiological Studies: Observational studies such as cohort, case-control, and cross-sectional studies provide valuable data on associations between exposures and outcomes. - Toxicological Data: Laboratory studies on animals or cellular models help understand the potential effects of hazardous agents. - Exposure Data: Information on environmental, occupational, and lifestyle exposures gathered through surveys, monitoring, and modeling.