A professional who identifies and tracks diseases in a group of people and develops methods to prevent or control the spread of diseases is an

• A. Epidemiologist
• B. Immunologist
• C. Microbiologist
• D. Pathologist

Answer: (A)

Identifying and tracking disease patterns in groups and designing strategies to stop the spread is the work of epidemiology. The person who fits this description conducts surveillance to detect outbreaks, analyzes how a disease moves through a population, and develops interventions to prevent or control transmission—such as vaccination programs, public health messaging, or quarantine measures. An immunologist specializes in how the immune system fights infections, vaccines, and immune responses, which is more about mechanisms inside individuals than about population-wide tracking and prevention. A microbiologist studies microorganisms in the lab to understand their biology and how they cause disease, not primarily how diseases spread through groups. A pathologist examines tissues to determine the cause and progression of disease at the cellular level, typically in clinical or postmortem contexts, not about population surveillance.