I need a straight answer. what is cmv infections?

Cytomegalovirus: It is an infection caused by cytomegalovius, a member of the herpesvirus family, it may affect the parotid gland, most people are assymptomatic unless they become immunosupressed like in HIV infection, transplant patients that are receiving suppressive therapy. Cytomegalovirus may affect the retina in HIV patients, may cause ulcer of the esophagous etc...

Viral infection: CMV stands for cytomegalo viirus. More than 50% of the population acquires the infection in childhood without any symptoms, signs or disease. Primary CMV infection in a pregnant woman can cause serious disease in the fetus. Adults with immune deficiency may reactivate their latent CMV and develop various illnesses from it, e.g., retinitis, vasculitis.