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Anti-flu virus antibody profile by nucleic acid amplification probe (serum/plasma)

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

This test measures antibodies to flu viruses in your blood, helping detect past infection or immunity. It uses a probe to identify genetic material from flu viruses.

Quick summary

["Checks for flu exposure or immunity through antibody detection."]

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

Key facts at a glance

LOINC
76077-7
Short code
FLUAV RNA BAL Ql NAA+probe
Synonyms
FLUAV RNA BAL 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

Why This Test Is Done

Your healthcare provider may order this test if you’ve had symptoms of the flu, recently traveled to an area with flu outbreaks, or if you’re at higher risk for flu complications. It can also be used to confirm a diagnosis or assess immunity before vaccination.

What to Expect Before the Test

No special preparation is needed. You’ll typically provide a blood sample drawn from a vein in your arm. If you’re using a home test kit, follow the manufacturer’s instructions carefully.

What the Test Results Mean

Positive results indicate the presence of flu antibodies, suggesting past infection or exposure. Negative results mean no detectable antibodies at this time. Results may take several days to process.

Common Causes of Positive Results

A positive test could mean you had a flu infection in the past, were exposed to the virus, or are developing immunity. It does not always indicate active illness at the time of testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Viral antibody test (flu)

Frequently asked questions

How long does it take to get flu antibody test results?
Results are typically available within 3 to 7 business days, depending on your lab’s processing time. Home test kits may provide results sooner, but confirmatory lab results may still be needed.
Can I get this test at home?
Yes, some flu antibody tests are available over-the-counter for home use. These kits use a blood sample collected via fingerstick. Always follow the instructions carefully and consult your provider if you have questions.
Does this test detect active flu infection?
No, this test detects antibodies to flu viruses, indicating past exposure or immunity—not active infection. For diagnosing current illness, rapid antigen tests or viral cultures are typically used.
  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