i have CMV immunity from contracting it some time ago - it was basically like a cold or flu that developed into glandular fever type symptoms (i was very run down at the time!) - as mentioned, it's unusual for people to have not been exposed at some point in their lives

i guess if you're exposed early in pregnancy, like any major virus, it might have some potential impact on your baby, so if you know someone that has it and are thinking of getting pg, i'd go and get your immunity tested now just to make sure