In a city where the number of reported cases of a sudden infectious disease rises sharply above baseline for several weeks, surpassing what is expected for that season, this pattern is best described as an:

• A. Endemic.
• B. Epidemic.
• C. Pandemic.
• D. Sporadic.

Answer: (B)

A rise in cases above what is normally expected in a specific place and time signals an epidemic. Here, a city experiences a sharp increase in reported cases of a sudden infectious disease that lasts for several weeks, exceeding the seasonal baseline. That pattern shows transmission beyond the usual level within a defined population and period, which defines an epidemic. Endemic means the disease is consistently present at a baseline rate, not spiking. Sporadic refers to isolated, irregular cases without a sustained rise. Pandemic implies widespread transmission across large regions or worldwide. So the described situation best describes an epidemic.