Facts about CMV/HSV/Syphilis 1 out of 3 pregnant women who become infected with CMV will pass it on to their unborn child. A positive test for CMV IgG indicates that a person was infected with CMV at some time during their life but does not indicate when a person was infected. About 15% of babies with congenital CMV will not have signs at birth but will later develop hearing loss. Over half of adults have been infected with CMV by age 40. Pathogen Detection Kits Our quick, easy, and cost-effective kits are designed to rapidly identify any pathogen (virus, bacteria, fungi) in any environment. LEARN MORE