Skip to content

Respiratory Syncytial Virus Antibody, Serum – Qualitative Titration

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

This test checks for the presence of antibodies to respiratory syncytial virus (RSV) in your blood. Antibodies indicate your immune system has encountered RSV before, which can help guide decisions about prevention or treatment.

Quick summary

["Determines if your immune system has been exposed to RSV, supporting decisions about vaccination or infection risk management."]

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

Key facts at a glance

LOINC
24298-2
Short code
RSV Ab sp1 Titr Ser
Synonyms
RSV Ab sp1 Titr Ser
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms of respiratory illness (like cough, fever, or breathing difficulties) and suspect RSV exposure, especially in infants, young children, or immunocompromised individuals. It may also be used in research or clinical trials related to RSV immunity.

What to Expect Before the Test

No special preparation is needed. A blood sample will be drawn from a vein in your arm. You may feel a brief pinch, but it usually doesn’t cause significant discomfort. The process takes about 5 minutes.

What the Test Results Mean

Results are qualitative (positive or negative) rather than numeric. A positive result means your body has produced antibodies to RSV, suggesting past exposure. A negative result means no detectable antibodies were found at this time.

Common Reasons for Positive Results

A positive test often occurs after recovering from RSV infection, but antibodies can remain for months or years. It may also be detected in people who received RSV vaccines or immune globulin treatments.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

RSV Antibody Screening

Frequently asked questions

Will this test show if I currently have RSV?
No, this test only detects antibodies from past RSV exposure. For diagnosing active RSV infection, a different test (such as viral detection) would be needed.
How long do I need to wait for results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will contact you with the outcome.
Can I get this test at home?
No, this test requires a blood sample collected in a clinical setting by a healthcare professional. Home-based tests for RSV antibodies are not available for this specific method.
  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