A rubella blood test detects antibodies that are made by the immune system to help kill

the rubella virus. These antibodies remain in the bloodstream for years. The presence of

certain antibodies means a recent infection, a past infection, or that you have been vaccinated

against the disease.Reference Range: 7 IU/mL or less: Negative - No significant level of

detectable rubella IgG antibody. 8-9 IU/mL: Equivocal - Repeat testing in 10-14 days may be

helpful. 10 IU/mL or greater: Positive - IgG antibody to rubella detected, which may indicate

a current or previous exposure/immunization to rubella.