In order to develop chicken pox, one must be exposed to the virus that causes chicken pox. Note, however, that not everyone who is exposed to the virus is affected. In other words, the virus is a ________
A) risk factor.
B) necessary cause.
C) sufficient cause.
D) contributory cause.

Question

Quizplus · Accepted Answer

A necessary cause is a factor that must be present in order for a certain condition or disease to occur. In this case, exposure to the virus that causes chicken pox is a necessary cause for developing the disease.

In Order to Develop Chicken Pox, One Must Be Exposed