Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Rubella IgG: the rubella virus antibody IgG test explained
A rubella virus antibody IgG test detects IgG antibodies against the rubella virus in your blood. The presence of these rubella antibodies usually indicates immunity, either from a past rubella virus infection or from successful vaccination. Unlike an IgM test, which can suggest a recent infection, an IgG test points to longer-term immune protection.
What It Measures
This test measures whether IgG antibodies specific to the rubella virus are present. IgG antibodies develop after infection or vaccination. They usually persist for life and provide long-term immunity. IgG test results are reported as either positive or negative. Positive results generally indicate that some level of immunity is present.
Why It Matters
Rubella immunity is particularly important for women of childbearing age, as rubella infection during early pregnancy can cause congenital rubella syndrome (CRS), leading to serious birth defects. In rare cases an IgG test can give a false positive, so a doctor may repeat or combine tests before drawing conclusions. Verifying immunity through IgG testing supports pregnancy planning and public health protection.
When to Test
Testing may be recommended before or during pregnancy, for healthcare workers, when vaccination records are unavailable, or as part of prenatal screening. Consult a healthcare professional for guidance on whether this test is appropriate for your situation.
Lifestyle Tips
Ensure your MMR (measles, mumps, rubella) vaccination is up to date. If you are planning a pregnancy and your rubella immunity status is unknown, discuss testing with your healthcare provider. Vaccination should be completed before conception, as the rubella vaccine is not recommended during pregnancy.
Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.