Facts about CMV/HSV/Syphilis About 15% of babies with congenital CMV will not have signs at birth but will later develop hearing loss. CMV testing should be done within 2-3 weeks of birth to determine if it is congenital. Young children are a common source of CMV. By the age of 5 years, 1 in 3 children has been infected with CMV but usually does not have symptoms. 91% of women do not know about CMV. 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