: Measles Virus Antibody, Serum
: This test looks for antibodies your body makes against the measles virus in a sample of blood serum. It can help show whether you have been exposed to measles or have protection from past infection or vaccination.
[": A measles antibody test helps determine whether you have immunity to measles or evidence of recent or past infection."]
Key facts at a glance
- LOINC
- 31518-4
- Short code
- M synoviae Ab Ser-aCnc
- Synonyms
- M synoviae Ab Ser-aCnc
- 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
: What This Test Measures
: The test detects antibodies (immune proteins) that target the measles virus. These antibodies appear after infection or vaccination and are part of the body's defense against the virus.
: Why It May Be Ordered
: Your healthcare provider may order this test to check whether you are immune to measles, to help investigate a possible measles infection, or to support public health and exposure investigations. It is often used alongside your symptoms and vaccination history.
: How the Sample Is Collected
: A small blood sample is drawn from a vein, usually in your arm, and the serum (the clear liquid part of blood) is used for testing. Collection is quick and generally well tolerated.
: What the Results Mean
: Results are typically reported as positive, negative, or sometimes equivocal (uncertain), depending on the method and the laboratory. A positive result generally indicates antibodies are present, which may reflect past infection or vaccination. A negative result may mean no detectable antibodies. Your provider will interpret results together with your history and may recommend follow-up testing.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
: Measles is a highly contagious viral illness that can be prevented by vaccination. Antibody testing supports immunity assessment and outbreak investigations, but it does not replace clinical evaluation. Results should always be interpreted by a healthcare professional in the context of symptoms, exposure history, and vaccination status.
Short name
: Measles Ab
Frequently asked questions
: Do I need to fast before this test?
: Can this test tell me if I am currently infected?
: Does a positive result always mean I had measles?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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