Cytomegalovirus (CMV) is a common virus. Most healthy people will not have any signs or symptoms and will not know they have had it. When a pregnant woman is infected, there is a risk of infection of the baby. When this happens, it is called congenital CMV infection, or cCMV for short.
cCMV can affect a baby’s growth and the development of a baby’s brain, inner ears, and eyes. Babies with cCMV infection can be born with symptoms or be at risk of developing health problems in early childhood. It is estimated that 1 in 5 babies with cCMV infection will develop permanent problems, most commonly permanent hearing loss (PHL).