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Herpes Simplex Virus 1 Antibody, Qualitative (IgG)

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

This test checks for antibodies to the herpes simplex virus type 1 (HSV-1), which causes cold sores and can also affect other parts of the body. Antibodies indicate past infection or immunity.

Quick summary

["This test helps determine if you’ve been exposed to HSV-1 or if your body has developed immunity."]

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

Key facts at a glance

LOINC
44471-1
Short code
HSV1 Ag Cvx Ql
Synonyms
HSV1 Ag Cvx Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like cold sores, recurrent mouth ulcers, or if you’re planning pregnancy and have concerns about HSV-1 exposure. It may also be used for screening in certain high-risk groups or to monitor immune response.

What to Expect Before the Test

No special preparation is needed. You’ll likely provide a blood sample from a vein in your arm. If you’re concerned about discomfort, let your provider know.

What the Test Results Mean

A positive result means you have antibodies to HSV-1, suggesting past infection or immunity. A negative result means no detectable antibodies, so you may not have been infected or your immune system hasn’t produced detectable antibodies yet.

Common Causes of Positive Results

A positive result could be due to past HSV-1 infection, even if you don’t currently have symptoms. It may also indicate immunity from vaccination or prior exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HSV-1 Antibody Test

Frequently asked questions

Will this test show if I currently have an active cold sore?
No, this test only detects antibodies, which indicate past infection or immunity. If you have an active cold sore, your provider may order additional tests to check for active HSV-1 infection.
Can I get this test if I’m pregnant?
Yes, this test can be done during pregnancy to check for HSV-1 antibodies. It helps assess potential risk and guide prenatal care decisions.
What if my test is positive but I don’t have symptoms?
A positive result means your body has recognized HSV-1, but it doesn’t necessarily mean you’ll have symptoms or complications. Many people with antibodies don’t experience issues, but your provider may recommend monitoring or preventive measures if needed.
  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