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Antibody Detection for Influenza Virus (Qualitative Immunoassay)

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

This test checks for antibodies in your blood that may indicate past or recent exposure to the influenza virus. It helps determine if your immune system has responded to flu infection.

Quick summary

["This test helps doctors assess flu exposure and guide treatment or vaccination decisions."]

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

Key facts at a glance

LOINC
38270-5
Short code
FLUAV H7 RNA Spec Ql NAA+probe
Synonyms
FLUAV H7 RNA Spec Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 detects specific antibodies produced by your immune system in response to influenza virus proteins. These antibodies are part of your body’s natural defense against the flu.

How the Test Works

A small blood sample is taken, and a probe-based immunoassay measures antibody presence. If antibodies are found, it suggests your body has encountered the influenza virus.

Why It’s Done

Doctors may order this test to diagnose flu infection, especially in cases where symptoms are unclear or to evaluate immune response after vaccination.

What to Expect

You’ll have a quick blood draw, usually at a clinic or lab. Results are typically ready within a few days, depending on lab processing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Influenza Antibody Screen (Qualitative)

Frequently asked questions

Why might I need this test?
Your doctor may recommend it if you have flu-like symptoms but test results are inconclusive, or if you’re at higher risk for complications from the flu.
What does a positive result mean?
A positive result indicates your immune system has likely encountered the influenza virus, meaning you may have had flu infection or vaccination previously.
Will I need follow-up tests if my result is positive?
Yes, your doctor may suggest additional tests or monitoring, especially if you’re at risk for severe flu complications or need guidance on vaccination.
  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