Cytomegalovirus (CMV) is a common virus for people of all ages; however, a healthy person’s immune system usually keeps the virus from causing illness. In the United States, nearly one in three children are already infected with CMV by age five. Over half of adults by age 40 have been infected. Most healthy children and adults who contract the virus have few if any symptoms, so CMV often goes undiagnosed. Complications. Complications of CMV infection vary, depending on your overall health and when you were infected. Otherwise healthy adults. Rarely, CMV causes a healthy adult .
Most people come into contact with CMV in their lifetime. But usually, it's people with a weakened immune system, such as those with HIV/AIDS, who become ill from CMV infection. Some otherwise healthy people with CMV infection develop a mononucleosis-like syndrome. CMV is . Apr 20, 2018 · CMV infection occurs in people of all ages worldwide. Experts estimate that more than half of the adult population in the United States has been infected with CMV, and 80% of adults have had the infection by the time they are 40 years old. About one in 150 children is born with CMV infection (congenital cytomegalovirus).
Infection with CMV, like that with Epstein-Barr virus (EBV, a type 4 herpesvirus), can cause a type of infectious mononucleosis in adolescents and young adults. Both CMV and EBV mononucleosis cause fever and fatigue. But EBV also causes a severe sore throat. CMV does not.