Which professional studies patterns and causes of disease in populations?

• A. Epidemiologist
• B. Endocrinologist
• C. Cardiologist
• D. Dermatologist

Answer: (A)

Epidemiology is the study of patterns and causes of disease in populations. An epidemiologist examines how often diseases occur, who is affected, where and when they occur, and why they occur. They use statistical methods and study designs to identify risk factors, track outbreaks, and evaluate public health interventions, with the goal of preventing disease at the population level.

Endocrinology, cardiology, and dermatology are clinical specialties focused on diagnosing and treating individual patients within specific organ systems or hormonal contexts—endocrinologists on hormones, cardiologists on the heart, and dermatologists on the skin. These fields prioritize patient-level care rather than studying disease patterns across populations.