What term refers to a single person who is ill?

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Multiple Choice

What term refers to a single person who is ill?

Explanation:
In epidemiology, a case is a single person who is ill. This term is used in surveillance and investigations to identify every individual affected by the disease being studied. The other terms describe patterns of disease rather than an individual: endemic means the disease is consistently present in a population, pandemic describes disease spread across large geographic areas with many cases, and a disease cluster refers to a group of cases in a specific place or time that may warrant further investigation. So the best answer for a single ill person is a case.

In epidemiology, a case is a single person who is ill. This term is used in surveillance and investigations to identify every individual affected by the disease being studied. The other terms describe patterns of disease rather than an individual: endemic means the disease is consistently present in a population, pandemic describes disease spread across large geographic areas with many cases, and a disease cluster refers to a group of cases in a specific place or time that may warrant further investigation. So the best answer for a single ill person is a case.

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