Answer:
The correct measure of disease frequency represented by the percentage of new college students with antibodies to the Epstein-Barr virus at the time of their college entrance physical (8%) is:
(a) Prevalence
Prevalence measures the proportion of individuals in a population who have a particular condition (in this case, antibodies to the Epstein-Barr virus) at a specific point in time. It tells us the extent of the condition within the population at a given moment. In contrast, incidence rate measures the rate at which new cases of a condition occur in a population over a specified period, and risk typically refers to the probability of developing a condition in the future, which is not represented by the given percentage.
Explanation: