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Antibody to Flavivirus, IgG (Serum)

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

This test measures the level of Immunoglobulin G (IgG) antibodies against flaviviruses, which include viruses like dengue, yellow fever, and West Nile virus. These antibodies indicate past infection or immunity.

Quick summary

["Checks for past exposure to flaviviruses through IgG antibodies in your blood."]

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

Key facts at a glance

LOINC
110823-2
Short code
FLUAV IgG Msmt Ser
Synonyms
FLUAV IgG Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Does This Test Measure?

IgG antibodies are a type of protein your immune system produces in response to a flavivirus infection. Detecting these antibodies helps determine if you’ve been exposed to a flavivirus at some point, even if you don’t remember the illness. This test is often used in research, outbreak investigations, or for individuals traveling to regions where flaviviruses are common.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you’ve had symptoms of a flavivirus infection (like fever, headache, or rash) or if you’ve traveled to areas with active flavivirus transmission. It can also be used in research studies or to assess immunity in certain populations.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The serum (liquid part of blood without blood cells) is then tested in a lab using an immunoassay method to detect flavivirus-specific IgG antibodies.

What Are Common Results?

A positive result means your body has produced flavivirus-specific IgG antibodies, suggesting past exposure. A negative result indicates no detectable antibodies, meaning you either haven’t been exposed or the test was taken too soon after exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Antibody to Flavivirus

Frequently asked questions

Can this test confirm an active flavivirus infection?
No, this test only measures IgG antibodies, which indicate past exposure. To diagnose an active infection, additional tests like viral RNA detection or IgM antibody tests may be needed.
What does a positive result mean?
A positive result means your body has likely been exposed to a flavivirus at some point. This could mean you had an infection years ago or are immune due to vaccination or prior exposure. It does not necessarily mean you are currently infected or at risk of getting sick again.
Is this test covered by insurance?
Coverage depends on your insurance plan and the reason for the test. If recommended by your healthcare provider for a legitimate medical reason (e.g., travel, research), it may be covered. Always check with your insurance provider for specifics.
  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