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Antibody to Flavivirus (e.g., Dengue, Yellow Fever) – Immunoglobulin G (IgG) and/or IgM

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

This blood test checks for antibodies against viruses like dengue or yellow fever, helping determine if you’ve been exposed or infected.

Quick summary

["Assists in diagnosing viral infections and assessing past exposure to flaviviruses."]

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

Key facts at a glance

LOINC
6642-3
Short code
FLUAV Lenin Ab Ser HAI-aCnc
Synonyms
FLUAV Lenin Ab Ser HAI-aCnc
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 doctor may order this test if you’ve traveled to areas with flavivirus outbreaks, have flu-like symptoms, or suspect an infection. It can also help confirm a diagnosis in cases where other tests are inconclusive or if you’ve had recent exposure.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into a vein (usually in your arm) to draw blood. The process takes about 5 minutes. If you’re nervous, let your healthcare provider know—you can use a numbing cream or ask for a smaller needle.

What the Test Results Mean

Positive results for IgG antibodies suggest past infection or immunity, while IgM antibodies indicate recent infection. Both together may confirm exposure. False positives can occur in rare cases, so results should be interpreted by a healthcare provider.

Common Symptoms of Flavivirus Infection

Symptoms may include fever, headache, body aches, nausea, vomiting, or rash. Some people have no symptoms at all. If you develop these signs after travel or exposure, see a doctor promptly.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Flavivirus Antibody Panel

Frequently asked questions

What does a positive result mean?
A positive IgG result often means you’ve had the virus before and your body made antibodies to fight it. This can protect you from future infections. IgM alone usually means an active infection is ongoing, but IgG/IgM together may indicate past exposure with residual immunity.
Can this test detect all flaviviruses?
This test checks for antibodies to common flaviviruses like dengue and yellow fever, but not all viruses in this family. Your doctor may order additional tests if needed.
How long does it take to get results?
Results are typically ready within 24–72 hours, depending on lab processing times. Your doctor will discuss them with you during your follow-up visit.
  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