Chapter 21, Problem 9SA

Summary Introduction

To answer:

The reason so as to why there is so little cytomegalovirus (CMV) disease in the world even when $50\%$ of the adult population in the United States and $100\%$ population in other countries is infected by CMV.

Concept introduction:

Cytomegalovirus is a herpes virus found in almost everyone around the world. About $50\%$ of the adult population and $100\%$ population in other countries is infected by this virus. The cells that are infected with CMV becomes enlarged and this is the reason cytomegalovirus is named so.