In a small town, 500 individuals are living with a chronic medical condition. The population of the town is 2,000. Which of the following terms best describes the measure of the total number of people in this population affected by the condition at one point?

**E) Point prevalence**

Point prevalence represents the proportion of individuals with a specific condition at a particular point in time. In this case, it indicates the total number of people living with the chronic medical condition in the town at one specific moment.

**Answer choice A:** Attack rate, is incorrect. The attack rate is used in the context of infectious diseases and represents the proportion of individuals who develop the disease among those exposed to it.

**Answer choice B:** Cumulative incidence, is incorrect. Cumulative incidence is the measure of the total number of new and old cases of a specific condition in a population during a defined period, not at one specific point in time.

**Answer choice C:** Incidence rate, is incorrect. Incidence rate is a measure of the rate at which new cases of a condition occur in a population over a specified time, not at one specific point.

**Answer choice D:** Period prevalence, is incorrect. Period prevalence is the proportion of individuals with a specific condition over a defined period, which may be longer than a point prevalence but does not capture the total number of people affected at one point.

###### Key Learning Point

Prevalence is the total number of people in a population affected by a condition at one point, and point prevalence specifically measures the proportion of individuals with the condition at a specific moment in time.