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Respiratory Syncytial Virus (RSV) Antibody Test (Serum/Plasma)

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

This test detects antibodies to respiratory syncytial virus (RSV), a common virus that can cause respiratory infections in infants, children, and older adults. It helps determine if your immune system has been exposed to RSV.

Quick summary

["This test checks for past or current RSV infection by measuring your immune response."]

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

Key facts at a glance

LOINC
102048-6
Short code
SARS (COVID-2) + RSV Ag Nasoph Ql IF
Synonyms
SARS (COVID-2) + RSV Ag Nasoph Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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 Is Done

Doctors may order this test to diagnose RSV infection, especially in high-risk groups like infants, elderly individuals, or those with weakened immune systems. It can also help assess exposure in outbreaks or monitor immune response after vaccination.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. If you’re concerned about discomfort, let your healthcare provider know.

What the Test Results Mean

Positive results indicate an immune response to RSV, suggesting past infection. Negative results mean no detectable antibodies, but this doesn’t always confirm absence of infection. Follow-up testing may be needed for further evaluation.

Common Uses and Considerations

This test is primarily used for diagnostic purposes or to assess exposure in clinical settings. It’s not typically used for routine screening unless symptoms or risk factors are present.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test helps identify RSV exposure, which can guide treatment decisions, especially in vulnerable populations. Antibody levels may also be monitored in research or vaccine studies to track immune responses.

Short name

RSV Antibody Test

Frequently asked questions

How long does it take to get results from this test?
Results are usually available within 1–3 business days, depending on your lab’s processing time. Your healthcare provider will contact you once results are ready.
Can I get this test if I’m not sick?
Yes, this test can be done even if you’re not experiencing symptoms. It’s often ordered for research, outbreak investigations, or high-risk groups to assess exposure.
What if my results are positive but I don’t feel sick?
A positive result means your body has recognized RSV, but symptoms may not appear immediately. Some infections are mild or asymptomatic, so further evaluation may be needed to understand your exposure.
  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