IgG rubella antibody in a concentration of 1:8 or greater indicates:

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In evaluation of the immune status of patients,IgG antibodies that are present in a dilution of 1:8 or greater indicate past infection with rubella virus and clinical protection against future rubella infection.The clinical significance of lower levels is not currently known.Titers of 1:16,1:64,1:512,or higher may be found in acute and past infections;however,the diagnosis of acute infections requires an IgM antibody titer on the same specimen or a paired specimen comparison.IgM also appears for a transient period after vaccination.

IgG Rubella Antibody in a Concentration of 1:8 or Greater