Cytomegalovirus (CMV) is a common virus that belongs to the herpesvirus family. Most people are exposed to CMV at some point in their lives, and it typically remains dormant in the body after the initial infection. While generally harmless to healthy individuals, CMV can pose serious health risks to immunocompromised individuals and unborn babies. Understanding its implications in toxicology involves examining how it interacts with the immune system and its potential influence on drug metabolism.