SARS-CoV-2 Antibody (Serum/Plasma) – Qualitative Immunoassay (Screen/Confirm)
This test detects antibodies in your blood that your immune system produces in response to the SARS-CoV-2 virus, which causes COVID-19. Antibodies may appear weeks after infection or vaccination.
["This test helps determine if your body has developed immunity to COVID-19, either from past infection or vaccination."]
Key facts at a glance
- LOINC
- 94769-7
- Short code
- SARS-CoV-2 Ab SerPl IA-aCnc
- Synonyms
- SARS-CoV-2 Ab SerPl IA-aCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- 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 Does This Test Measure?
The test looks for specific antibodies (immunoglobulins) in your serum or plasma that target the SARS-CoV-2 virus. These antibodies are part of your immune response and can indicate exposure to the virus or vaccination. The test is designed to be both a screening and confirmatory tool, depending on clinical context.
Why Might You Need This Test?
Healthcare providers may recommend this test if you have had symptoms of COVID-19, have been exposed to the virus, or if you are recovering from an infection. It may also be used to assess immunity in vaccinated individuals or to monitor ongoing immunity over time.
How Is the Test Performed?
A blood sample is drawn from a vein in your arm. The sample is then tested using an immunoassay method, which detects the presence of antibodies against SARS-CoV-2. This process typically involves a laboratory analysis to identify antibody levels.
What Are the Possible Results?
Results are qualitative (positive or negative) and indicate whether antibodies were detected. A positive result suggests your immune system has recognized the virus or vaccination, while a negative result means no detectable antibodies were found at the time of testing.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive antibody test can confirm past infection or vaccination-induced immunity, which may provide protection against future infection. However, antibody levels can wane over time, and immunity may not be lifelong. This test is not a substitute for ongoing vaccination or other preventive measures. Clinical interpretation should always be done by a healthcare provider based on your medical history and symptoms.
Short name
SARS-CoV-2 Antibody Test
Frequently asked questions
When Should I Expect Results?
What Does a Positive Test Mean for Me?
Can Antibody Levels Change Over Time?
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