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HIV Antibody and HIV-1 RNA (Qualitative and Quantitative) Screening and Confirmation

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

This test checks for HIV antibodies and the virus itself to determine if you have HIV infection.

Quick summary

["Early detection helps manage the condition and prevents complications."]

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

Key facts at a glance

LOINC
42768-2
Short code
HIV 1 & 2 Ab Ser-Imp
Synonyms
HIV 1 & 2 Ab Ser-Imp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86701
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 includes two parts: a screening test to detect HIV antibodies (qualitative) and an optional follow-up test to measure HIV-1 RNA (quantitative) to assess viral load. Antibodies are proteins your immune system makes in response to the HIV virus. The RNA test helps track how well your treatment is working.

Why It’s Done

Screening tests are often used during routine check-ups, before surgeries, or in high-risk groups. Confirmatory tests are performed if initial screening suggests a possible infection to confirm or rule out HIV.

Sample Collection and Preparation

For antibody testing, blood is drawn from a vein. For the RNA test, blood plasma is collected. The blood sample is processed and tested in a lab using immunoassay methods to detect antibodies or viral genetic material.

Test Results Interpretation

Results are reported as positive, negative, or indeterminate. A positive antibody test may require further testing to confirm HIV infection. The RNA test result indicates the amount of virus in your blood, which can guide treatment decisions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HIV Test (Screen & Confirm)

Frequently asked questions

What does a positive screening test mean?
A positive screening test suggests you may have HIV antibodies, which means your body has detected the virus. You’ll need a confirmatory test to confirm the diagnosis. This step is essential to avoid false positives and ensure accurate treatment planning.
How long does it take to get results?
Results from antibody screening tests are typically available within 1 to 3 business days. The RNA test results may take longer, often 1 to 2 weeks, depending on lab processing times.
Can I have false-positive or false-negative results?
Yes, both false positives and false negatives can occur. False positives may happen due to cross-reactions with other viruses or recent exposure. False negatives are less common but can occur if tested too early after exposure. Confirmatory testing helps avoid these errors.
  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