Disease prevention is the academic field and methodological approach focused on identifying and implementing strategies to reduce the incidence, prevalence, and severity of diseases and their consequences within individuals and populations. It systematically investigates the determinants of health, risk factors, and protective factors, and evaluates the effectiveness of interventions across primary (preventing onset), secondary (early detection and intervention), and tertiary (managing established disease to prevent complications) levels, aiming to improve health outcomes and reduce disease burden.