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Fluorescent Antibody Titration for Antihuman Influenza A Virus Antibodies (Serum/Plasma)

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

This test measures the level of antibodies your body produces in response to exposure to the influenza A virus. It helps determine if you’ve been infected or vaccinated and whether your immune system is responding.

Quick summary

["Assesses immunity to influenza A virus through antibody detection."]

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

Key facts at a glance

LOINC
22824-7
Short code
FLUAV Ab Titr Ser HAI
Synonyms
FLUAV Ab Titr Ser HAI
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
hai
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 have symptoms of the flu (e.g., fever, cough, body aches) or if you’ve been exposed to someone with the flu. It can also be used to check if vaccination has provided protection or if your immune response needs evaluation.

How the Test Works

A small blood sample is taken and tested using a fluorescent antibody technique. This method detects specific antibodies that target the influenza A virus, helping identify your immune response level.

Sample Collection

Blood is drawn from a vein in your arm, similar to other blood tests. The sample is sent to a lab for processing and analysis.

What to Expect Before the Test

No special preparation is needed, but inform your provider if you’re on blood-thinning medications or have a history of bleeding disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Influenza A Antibody Titration

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of antibodies against the influenza A virus, suggesting you’ve either been infected or vaccinated. However, antibody levels alone don’t confirm active illness—symptoms and clinical evaluation are needed for diagnosis.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will discuss findings with you during your follow-up visit.
Can I get this test at home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home collection kits for antibody testing exist but are generally for different purposes (e.g., rapid antigen tests).
  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