Polio is a disease that was almost eradicated, but there are still new cases that appear due to the failure to immunize all children. Researchers keep close tabs on how many new cases of this disease occur each year in the hope that it will soon cease to exist. This enumeration is an example of
A) prevalence.
B) duration.
C) incidence.
D) frequency.

Question

Quizplus · Accepted Answer

Incidence refers to the number of new cases of a disease that appear in a population during a specific period of time. The description provided is an example of tracking the incidence of polio, as it focuses on new cases appearing each year.

Polio Is a Disease That Was Almost Eradicated, but There