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SARS-CoV-2 Genomic Sequence Qualitative (Serum/Plasma)

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

This test checks for the genetic material of the virus that causes COVID-19 in your blood. It helps determine if you have an active infection.

Quick summary

["This test helps confirm COVID-19 infection by detecting the virus’s genetic material in your blood."]

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

Key facts at a glance

LOINC
95609-4
Short code
SARS-CoV-2 S gene Resp Ql Seq
Synonyms
SARS-CoV-2 S gene Resp Ql Seq
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
sequencing
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 looks for the presence of the SARS-CoV-2 virus’s genetic sequence in your serum or plasma. This is done through a specialized sequencing process that identifies viral DNA or RNA fragments, which can indicate an active infection.

How the Test Works

A small blood sample is taken and analyzed using advanced sequencing technology. The lab extracts viral genetic material and compares it to known sequences of the SARS-CoV-2 virus to confirm its presence.

Why It’s Done

This test may be used to screen for COVID-19 in individuals suspected of having an active infection, particularly in cases where rapid antigen or antibody tests are inconclusive or unavailable.

When You Might Need This Test

You may receive this test if you have symptoms of COVID-19, have been exposed to someone with the virus, or if your healthcare provider suspects an active infection despite negative rapid tests.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

SARS-CoV-2 Genomic Screening

Frequently asked questions

What Does a Positive Result Mean?
A positive result means your blood contains genetic material from the SARS-CoV-2 virus, confirming an active infection. Follow your healthcare provider’s advice regarding treatment and isolation.
What Does a Negative Result Mean?
A negative result means the virus genetic material was not found in your blood at the time of testing. However, COVID-19 can still be present in other body fluids or you may have been infected earlier. Retesting may be recommended if symptoms persist.
How Long Does It Take to Get Results?
Results are typically available within 2 to 5 business days, depending on lab processing times. Your healthcare provider will contact you with the results.
  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