Influenza Virus Nucleic Acid, Respiratory Specimen, Qualitative
This test detects the genetic material of the influenza virus in your respiratory sample to help determine if you have an active flu infection.
["A quick way to check for flu infection using a simple nasal or throat swab."]
Key facts at a glance
- LOINC
- 80381-7
- Short code
- FLUAV + FLUBV Ag Pnl Upper resp IA.rapid
- Synonyms
- FLUAV + FLUBV Ag Pnl Upper resp IA.rapid
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia-rapid
- 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
How the Test Works
The test uses a specialized swab to collect a sample from your nose or throat. The sample is then analyzed in a lab to identify the presence of influenza virus genetic material. This is done through a rapid nucleic acid amplification technique that provides results in minutes.
What to Expect Before the Test
You may experience mild discomfort or irritation when the swab is inserted, but it typically doesn’t require any special preparation. Avoid using nasal decongestants or sprays 15–30 minutes before the test if possible, as they might affect the sample.
Common Uses
This test is commonly used to diagnose influenza in patients with symptoms such as fever, cough, sore throat, body aches, or fatigue, especially during flu season.
Who Might Need This Test
Healthcare providers may recommend this test for individuals who have flu-like symptoms, are at higher risk of complications from the flu, or are in settings where rapid diagnosis is critical (e.g., healthcare facilities, schools).
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive result confirms an active influenza infection and helps guide treatment decisions, such as antiviral medications that can be most effective when started early. A negative result means the test did not detect the virus, but symptoms could still be due to other causes or may resolve on their own.
Short name
Influenza Rapid Test (Nucleic Acid)
Frequently asked questions
How soon can I expect results?
What does a positive result mean?
Can I still get the flu even if my test is negative?
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