Cytomegalovirus (CMV) and Congenital CMV Infection

Baby swaddled in a blanket.

Cytomegalovirus (pronounced sy-toe-MEG-a-low-vy-rus), or CMV, is a common virus that infects people of all ages. Over half of adults by age 40 have been infected with CMV. Most people infected with CMV show no signs or symptoms. When a baby is born with cytomegalovirus (CMV) infection, it is called congenital CMV. About one out of every 200 babies is born with congenital CMV infection.  About one in five babies with congenital CMV infection will have long-term health problems.