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🧪 What is Rubella IgG?

The Rubella IgG test measures the presence and level of Immunoglobulin G (IgG) antibodies against the Rubella virus in the blood.
IgG antibodies indicate past exposure, immunity, or vaccination against rubella.

❓ Why is the Test Done?

To:

Determine immunity to rubella, especially in women of childbearing age or during pregnancy
Assess need for vaccination
Diagnose recent or past rubella infection (usually IgM is for recent infection)
Evaluate risk of congenital rubella syndrome (CRS) in fetus

📊 Normal Range / Interpretation

Rubella IgG Level	Interpretation
Negative or <10 IU/mL	Susceptible to rubella infection; no immunity
Equivocal	Borderline immunity; retest recommended
Positive or ≥10 IU/mL	Immune due to past infection or vaccination

Exact cutoff values may vary by lab.

📈 Clinical Significance

Result	Implication
Positive IgG	Immunity; protection against rubella infection
Negative IgG	Susceptible; vaccination recommended
Low/Equivocal IgG	May need repeat testing or booster vaccination

🧠 Associated Conditions

Condition	Details
Rubella infection	Generally mild in children and adults
Congenital Rubella Syndrome	Severe fetal complications if mother infected during pregnancy
Vaccination	Provides protective immunity

🔄 Related / Follow-Up Tests

Rubella IgM – detects recent or acute infection
PCR for Rubella virus – confirmatory in suspected congenital infection
Prenatal screening – part of antenatal checkups for immunity status

✅ Fasting Required?

Test	Fasting Required
Rubella IgG	❌ No

📝 Summary Table

Parameter	Details
What	Measures IgG antibodies against Rubella virus
Why	Assess immunity or past exposure
Normal Range	≥10 IU/mL indicates immunity
Negative Result	Susceptible to infection; vaccination advised
Associated Conditions	Rubella infection, congenital rubella syndrome
Follow-up Tests	Rubella IgM, PCR, prenatal screening
Fasting Required	❌ No

Rubella - IgG

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