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Rubella Antibody (IgG) by Immunoassay, Serum/Plasma

Published: August 9, 2026Updated: August 16, 2026

This test checks for rubella antibodies in your blood to determine if your immune system has ever been exposed to the rubella virus.

Quick summary

["Rubella IgG helps assess immunity status against rubella infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
90776-6
Short code
HEDIS 2019 Rubella Ab
Synonyms
HEDIS 2019 Rubella Ab
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test to evaluate whether you have immunity to rubella, especially if you’re pregnant, planning pregnancy, or have a weakened immune system. It can also help diagnose rubella infection in people who have recently been exposed to the virus or during outbreaks.

What to Expect Before the Test

No special preparation is needed. A blood sample will be drawn from a vein in your arm by a healthcare professional. You may feel a slight pinch, but it usually takes only a few minutes.

What the Test Results Mean

Positive results indicate the presence of rubella antibodies, suggesting past exposure and immunity. Negative results mean you likely haven’t been exposed or have no immunity. Low or absent levels may require further testing or vaccination counseling.

Common Causes of Abnormal Results

High antibody levels are normal after rubella infection or vaccination. Low or absent levels may indicate no prior exposure, recent infection, or a compromised immune response. Always discuss results with your healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Rubella IgG

Frequently asked questions

Is rubella dangerous?
Rubella can cause serious complications, especially in pregnant women, including miscarriage, stillbirth, or birth defects like deafness, heart defects, or eye problems in the baby. Vaccination is the best way to prevent it.
What if I’m pregnant and this test is positive?
A positive rubella IgG result usually means you’re immune and safe during pregnancy. However, your doctor may still recommend additional testing or vaccination if you’re unsure about your immunity status or if you were exposed recently.
Can I get rubella from a blood test?
No, rubella is spread through respiratory droplets or direct contact with infected saliva or mucus. Blood tests only detect antibodies, not the virus itself.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy