Immunoassay for Anti-Influenza Virus Antibodies (Serum/Plasma)
This test measures your immune response to influenza viruses by detecting antibodies in your blood. It helps determine if your body has been exposed to the flu virus.
["Checks if your immune system has recognized and fought off an influenza infection."]
Key facts at a glance
- LOINC
- 106996-2
- Short code
- T.pallidum Ab.IgM 15 Ser Ql IB
- Synonyms
- T.pallidum Ab.IgM 15 Ser Ql IB
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ib
- CPT
- 82784
- 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 specific antibodies (proteins produced by your immune system) that your body creates in response to exposure to influenza viruses. These antibodies are part of your natural defense against the flu and can indicate past infection or vaccination.
Why It’s Ordered
Your healthcare provider may order this test if you have symptoms of the flu, have been exposed to someone with the flu, or if you’re at higher risk of complications from influenza (e.g., young children, elderly adults, or those with chronic health conditions). It can also help confirm if vaccination has been effective.
Sample Collection and Preparation
A blood sample is taken from a vein in your arm. The blood is processed to separate the serum or plasma, which is then sent to a lab for testing. This process is quick and typically done in a doctor’s office or clinic.
What to Expect Before the Test
No special preparation is needed for this test. You can eat, drink, or take medications as usual on the day of your appointment. If you’re on blood-thinning medications, let your healthcare provider know before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results for influenza antibodies suggest past infection or vaccination. High antibody levels shortly after exposure may indicate recent infection. However, antibody levels can decline over time, so results alone shouldn’t replace clinical judgment for diagnosing active flu symptoms. This test is often used alongside other diagnostic tools, such as rapid flu tests or viral testing, for a complete evaluation.
Short name
Influenza Antibody Test
Frequently asked questions
How long does it take to get my results?
Can I get the flu even if my antibody test is negative?
Will I need to do anything special if my antibody levels are low?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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