Unborn fetuses are at special risk for serious damage to the developing nervous system.
Hearing loss may range from mild to profound, occur in one or both ears, and get progressively worse. CMV is a relatively harmless virus. Present in most people's bodies, the virus remains harmless until it is triggered by another infection such as the AIDS virus or staphylococcus bacterium. CMV is identified through blood tests. Infants mildly infected may show no symptoms or developmental delays.