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Respiratory Syncytial Virus (RSV) Antigen Rapid Test (Serum/Plasma)

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

This test detects the presence of respiratory syncytial virus (RSV) antibodies in your blood, helping identify if you’ve been exposed to the virus that commonly causes respiratory infections.

Quick summary

["A rapid screening tool to check for RSV antibodies, useful in assessing past exposure or infection risk."]

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

Key facts at a glance

LOINC
72885-7
Short code
RSV Ag Nph Ql IA.rapid
Synonyms
RSV Ag Nph Ql 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

What This Test Measures

The test looks for RSV antigens in your serum or plasma, which are proteins produced by the virus. This helps determine if you’ve had an active RSV infection or recent exposure.

Why It Might Be Ordered

Your healthcare provider may order this test if you have symptoms like coughing, wheezing, or difficulty breathing, especially if you’re at higher risk for severe RSV infections (e.g., infants, elderly adults, or those with weakened immune systems).

Sample Collection and Preparation

A small blood sample is drawn from your vein. The blood is then processed to separate serum or plasma, which is tested for RSV antigens using a rapid immunoassay method.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications or conditions that could affect test results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

RSV Antigen Screen (Rapid)

Frequently asked questions

This test is primarily used as a screening tool to identify potential RSV exposure, which can guide further evaluation or treatment decisions, especially in high-risk populations.
A positive result indicates recent RSV infection or exposure, but it does not confirm the exact timing or severity of illness. Follow-up testing or clinical correlation may be needed.
A negative result means the test did not detect RSV antigens at the time of testing, but RSV could still be present in other body fluids or you may have been infected earlier.
This test is not used to diagnose current RSV illness directly but may be part of a broader evaluation if respiratory symptoms are present.
How long will I need to wait for results?
Results are typically available within minutes to a few hours, depending on the lab’s processing time. Your provider will discuss the findings with you.
  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