Question

An epidemic is defined as

• A. Constant presence of disease in a population
• B. Worldwide spread of disease
• C. Sudden increase in disease cases above expected level
• D. Occurrence of rare disease

Hint:

Endemic means constant presence, epidemic means sudden rise above expected level, and pandemic means worldwide spread.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Epidemiology uses specific terms to describe the frequency and distribution of diseases in a community.
Step 2: Detailed Explanation:
1. Epidemic: This occurs when the number of cases of a disease in a specific region or population increases unexpectedly and rapidly beyond what is normally expected (the endemic level).
2. Endemic: This is the constant presence of a disease in a geographical area (Option A).
3. Pandemic: This is an epidemic that has spread over several countries or continents, usually affecting a large number of people worldwide (Option B).
4. Sporadic: Occasional, irregular cases.
Step 3: Final Answer:
The hallmark of an epidemic is the "sudden increase" in incidence relative to the historical baseline for that population.