Varicella Zoster IgM Antibodies
The Varicella Zoster IgM Antibodies test helps identify recent or current varicella zoster virus infection. It is used when acute chickenpox or shingles is suspected.
Turnaround time
4 days
Biomarkers count
1
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Details about Varicella Zoster IgM Antibodies
What is the Varicella Zoster IgM Antibodies test?
The Varicella Zoster IgM Antibodies test measures IgM antibodies produced by the immune system shortly after exposure to the varicella zoster virus (VZV). IgM antibodies are typically associated with recent or active infection.
This test is mainly used to support the diagnosis of acute chickenpox or, less commonly, recent shingles, particularly when symptoms are unclear or when PCR testing is not available. IgM antibodies usually appear early and decline over weeks.
Results must be interpreted carefully and in combination with symptoms and, where appropriate, other tests such as PCR or IgG antibodies.
Why do I need a Varicella Zoster IgM Antibodies test?
Identifying recent infection is important in clinical decision-making, especially in higher-risk individuals.
You may need this test if you:
- Have a recent onset of rash or blistering
- Have symptoms suggestive of chickenpox
- Are pregnant with suspected recent exposure
- Are immunocompromised with unclear symptoms
- Need to assess recent infection rather than immunity
- Have inconclusive PCR or clinical findings
The test helps support whether symptoms are linked to a recent VZV infection.
Benefits of the test
- Supports diagnosis of recent infection
Detects early immune response to VZV. - Useful when PCR is not performed
Provides serological evidence of recent exposure. - Helps differentiate recent from past infection
Complements IgG testing. - Important in pregnancy assessment
Supports evaluation of recent exposure. - Simple blood-based testing
Requires only one blood sample. - Widely used in clinical practice
Standard serology marker for acute infection. - Supports clinical decision-making
Helps guide further investigations. - Adds clarity in atypical cases
Useful when symptoms are unclear.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
- Choose your nearest UK clinic
- Attend your appointment
- Blood sample taken by a clinician
- Sample sent to the laboratory
- Results are issued once analysis is complete
Home or hotel visit (+£60, UK-wide)
- Mobile phlebotomist attends your location
- Blood sample taken at home or hotel
- No clinic visit required
- Sample securely transported to the laboratory
Your results explained
Negative IgM
- No detectable IgM antibodies
- UK standard: Negative
- Suggests no evidence of recent infection
Positive IgM
- IgM antibodies detected
- UK standard: Positive
- Suggests recent or current varicella zoster infection
False positives and prolonged IgM positivity can occur; results should be interpreted with clinical context and other tests.
How It Works
Simple steps to get your results
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Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
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WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.