Cytomegalovirus (sy toe MEG a low vy rus), or CMV, is a common virus that infects people of all ages. Most CMV infections are "silent," meaning most people who are infected with CMV have no signs or symptoms. However, CMV can cause disease in people with a weakened immune system and in babies infected before birth. About 1 in 150 children is born with congenital (present at birth) CMV infection...more
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