Prior to the approval of the chicken pox vaccine in 1995, many children became ill with chicken pox early in elementary school. This is an example of which of the following?
A) An endemic disease
B) An epidemic
C) A pandemic
D) None of the above

Question

Quizplus · Accepted Answer

An endemic disease is one that is consistently present in a specific geographic area or population. Chicken pox was endemic in many countries before the vaccine was approved, with many children becoming ill early in elementary school. This is in contrast to an epidemic, which refers to a sudden increase in the prevalence of a disease within a population, or a pandemic, which refers to a global outbreak of a disease.

Prior to the Approval of the Chicken Pox Vaccine in 1995