An epidemic is

• A. An unusual outbreak that occurs in larger numbers of cases than typically expected
• B. A globally spreading pandemic
• C. A disease that is constantly present in a region
• D. A rare disease with few cases

Answer: (A)

An epidemic is an outbreak characterized by an unusual increase in the number of disease cases in a particular population or geographic area, above what is normally expected. This focuses on both the larger-than-usual number of cases and the specific setting where they occur. The option that describes an unusual rise in cases beyond the usual level in a defined area matches this idea exactly. If the outbreak spreads globally across many countries, that would be a pandemic rather than just an epidemic. If the disease is continually present in a region, that’s endemic. If it appears only rarely with few cases, that’s sporadic. So the best description is an unusual outbreak in larger numbers than typically expected.