Epidemiologists use various study designs to investigate health issues: - Descriptive Studies: These studies describe the distribution of diseases and health conditions by person, place, and time. - Analytical Studies: These are designed to investigate the causes and risk factors of diseases. Examples include cohort studies, case-control studies, and randomized controlled trials. - Surveillance: Continuous collection, analysis, and interpretation of health-related data essential for planning, implementation, and evaluation of public health practice.
