Epidemiology focuses on what overarching aim?

• A. Diagnosis and treatment
• B. Prevention and control of disease and promotion of health
• C. Genetic engineering
• D. Individual patient care

Answer: (B)

The main idea being tested is that epidemiology aims to prevent disease and promote health at the population level. By studying how diseases occur and spread, and what factors influence them, epidemiology guides actions that reduce risk across communities—things like vaccination programs, screening, sanitation improvements, and health policies. This population focus is what allows public health to measure impact and plan interventions before many people become ill. In contrast, diagnosing and treating individuals, genetic engineering, or routine one-on-one patient care are centered on managing disease after it occurs or manipulating biology, not on broad population prevention and health promotion.