In which of the following circumstances would it be more helpful to us

In which of the following circumstances would it be more helpful to use the wheel model of epidemiology than the epidemiological triangle model?

a. When factors outside the triangle model are involved
b. When there are multiple causes for a chronic disease
c. When research has not yet determined the exact cause
d. When trying to explain the situation to a lay person

ESSAYBID ANSWER

ANS: B
The epidemiological triangle model of agent-host-environment is very useful, especially with single-cause infectious diseases. However, with the multiple factors involved in chronic diseases, the wheel model is more useful in analyzing and identifying the multiple variables.