Cytomegalovirus is a common infection with a wide range of symptoms - from no symptoms to fever and fatigue, to severe symptoms involving the eyes, brain, or other internal organs.

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Cytomegalovirus is a common infection with a wide range of symptoms - from no symptoms to fever and fatigue, to severe symptoms involving the eyes, brain, or other internal organs. 

The IgG antibody appears within a week of infection, then persists for life. If the IgG antibody isn't present, then the person is susceptible to contracting the virus. If the IgM antibody is negative but IgG antibody is positive, then it is likely that the person tested had a previous CMV infection.

CMV IgG

If an individual is positive for IgM antibodies, then it is likely that the person has an CMV infection and it may be early in the course of the illness.

CMV IgM

CMV antibodies help diagnose a current, recent, or past CMV infection.