Cytomegalovirus (CMV) is a common virus spread person to person through body fluids, such as saliva, blood, urine, semen, and breast milk. Healthy people generally display few or no symptoms as a result of CMV infection, but it can be dangerous for newborns, infants and people with compromised immune systems. In otherwise healthy adults, it may go unnoticed. 

Symptoms of congenital CMV in newborns include premature birth, low birth weight, jaundice, poor liver function, purple skin blotches or a rash, an abnormally small head, pneumonia, an enlarged spleen, and seizures. In adults with weakened immune systems, CMV may affect the eyes, lungs, liver, stomach, esophagus, intestines or brain. Health adults may experience fatigue, fever, sore throat, or aching muscles. 

No cure is available for CMV, but the condition may be treated with systemic antivirals.