Antibody Test for SARS-CoV-2 (Nucleocapsid Protein) – Rapid Qualitative Immunoassay
This test detects antibodies in your blood that your immune system produces in response to the SARS-CoV-2 virus, which causes COVID-19. It helps determine if you’ve been exposed to the virus, even if you didn’t show symptoms.
["This test checks for antibodies that your body makes after exposure to COVID-19, aiding in understanding past infection status."]
Key facts at a glance
- LOINC
- 95942-9
- Short code
- FLUABV+SARS-CoV Ag Pnl Up resp IA.rapid
- Synonyms
- FLUABV+SARS-CoV Ag Pnl Up resp IA.rapid
- 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-rapid
- 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
How the Test Works
The test uses a rapid immunoassay method to detect antibodies specific to the SARS-CoV-2 nucleocapsid protein. A small blood sample is collected, and results appear within about 15 minutes. Positive results indicate the presence of these antibodies, suggesting prior exposure to the virus.
What the Results Mean
A positive result means your immune system has likely encountered the virus, but it doesn’t confirm a current infection. Negative results mean no detectable antibodies were found, which could mean you haven’t been exposed recently or haven’t developed immunity yet.
When You Might Need This Test
This test may be used for screening after potential exposure to COVID-19, monitoring immunity in vaccinated individuals, or assessing past infection status in certain clinical settings.
Important Considerations
Results should not replace medical advice. False negatives can occur if testing is done too soon after exposure. Always consult your healthcare provider for interpretation and next steps.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Antibody detection helps track immunity, guide vaccination strategies, and assess exposure risk in high-risk populations. It’s particularly useful for understanding seroconversion post-vaccination or recovery from infection, though it doesn’t directly measure current viral load or active infection status.
Short name
SARS-CoV-2 Nucleocapsid Antibody (Rapid Test)
Frequently asked questions
Why might I get this test?
What does a positive result mean?
Can I get a false positive or negative result?
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