SARS-CoV-2 RNA in Respiratory Specimen (Qualitative)
This test detects genetic material from the virus that causes COVID-19 in your respiratory sample, such as nasal or throat swabs. It helps determine if you have an active infection.
["This test checks for the virus responsible for COVID-19 and can help guide treatment and isolation decisions."]
Key facts at a glance
- LOINC
- 104451-0
- Short code
- SARS-CoV-2 RNA Resp Ql
- Synonyms
- SARS-CoV-2 RNA Resp Ql
- 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
How the Test Works
The test uses a molecular method to identify specific genetic sequences of the SARS-CoV-2 virus. A small sample of your respiratory secretions (e.g., nasal or throat swab) is analyzed to detect the presence of viral RNA. If the virus is present, the test will confirm an active infection.
What to Expect Before the Test
You may be asked to avoid certain medications or activities before testing, but this is rare for a COVID-19 RNA test. Bring any recent medical records or medications you’re currently taking if instructed by your healthcare provider.
What to Expect During the Test
The test involves a simple nasal or throat swab. You may feel slight discomfort, but it typically takes only a few minutes. No special preparation is needed beyond following any general instructions from your healthcare team.
What to Expect After the Test
You can usually return to your normal activities immediately after testing. Follow-up instructions from your healthcare provider may include monitoring symptoms or additional testing if needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive result indicates the presence of SARS-CoV-2 RNA, suggesting an active COVID-19 infection. This can guide treatment decisions, such as starting antiviral medications or recommending isolation. A negative result means the test did not detect the virus at the time of testing, but false negatives can occur, especially if the sample was taken too early in the illness. Follow-up testing may be recommended if symptoms persist.
Short name
SARS-CoV-2 RNA Test (PCR)
Frequently asked questions
Why might I need this test?
What does a positive result mean?
Can I get this test at home?
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