Epstein-Barr Virus Viral Capsid Antigen (VCA) Antibody (IgA)
An antibody marker tied to chronic or reactivated EBV and nasopharyngeal carcinoma screening.
Consider this test if:
- Investigating possible chronic or reactivated EBV infection
- Screening or monitoring in the context of nasopharyngeal carcinoma risk or treatment
- Persistent symptoms with prior EBV exposure and a clinician wants a reactivation marker
- Tracking VCA IgA titers over time after nasopharyngeal carcinoma treatment
- HSA/FSA eligible
- Results delivered to your dashboard · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required, and timing during the day does not affect the result. A single blood draw is sufficient. Interpretation depends on the titer level, so use the same testing approach when comparing results over time.
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What this test is for
Epstein-Barr virus infects most people for life, usually silently after an initial mononucleosis-type illness. This test measures IgA antibodies to the viral capsid antigen (VCA), a less common EBV marker used mainly to flag chronic or reactivated infection rather than to confirm recent exposure. Higher titers (roughly 1:80 and above) point toward chronic or reactivated EBV, while low titers (1:10 to 1:40) typically reflect past infection. Its most distinctive use is in nasopharyngeal carcinoma, where elevated VCA IgA is found in most patients and titers fall with successful treatment, making it useful for both detection and monitoring.
For the standard question of current versus past EBV infection, the VCA IgM and IgG, EBNA IgG, and the full EBV antibody panel are the usual markers; VCA IgA is the specialized form reserved for reactivation and nasopharyngeal carcinoma questions.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Fast, dashboard-delivered results
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
pay as you go
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost — covering the lab and what it takes to run the service — never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9/mo, and you still pay the lab’s order fee. Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results post to your dashboard once your lab completes them, then a clinician reviews them and your full analysis and personalized action plan (with clear next steps) follow. Turnaround varies by test: specialty assays and at-home kits take longer, and each test shows its expected turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.
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