Why Private MD Labs?
90-day money-back guarantee Lab order in minutes Save a trip to the doctor Low prices since 2005 Labs within 2 miles
COVID-19 nucleocapsid antibody test for adults checking past infection status

SARS-CoV-2 Antibody Test - Past COVID-19 Infection Check

SARS-CoV-2 Antibody (IgG), Nucleocapsid, Qualitative

  • Detect past coronavirus infection exposure
  • Check natural immunity from vaccine status
  • Screen your recent infection history
$702
First results as soon as overnight*

All results normal? Get your money back. First-time customers only. File a support ticket titled “Money Back Guarantee” with your order number within 15 days of receiving your results. STD, Sickle Cell, and gift orders aren’t eligible. Full terms apply. guarantee
No questions asked refunds
LegitScript certified

Prescription & all lab fees included

Go directly to the lab, no extra fees

Doctor's guidance included

Easy to understand results

Fast & convenient

Lab visit as quick as 10 mins in & out

  • Many results come back overnight *
  • 90-day money back guarantee
  • Save time & skip the doctor’s office
  • Lab visit as quick as 10 minutes
  • Results explained, with clear next steps
  • LegitScript certified
  • No questions asked refunds
  • The price you see is the price you pay
  • Many results come back overnight *
  • 90-day money back guarantee
  • Save time & skip the doctor’s office
  • Lab visit as quick as 10 minutes
  • Results explained, with clear next steps
  • LegitScript certified
  • No questions asked refunds
  • The price you see is the price you pay

What's this test for?

This test is ideal if you're wondering whether you've been infected with SARS-CoV-2 in the past, even if you never had a positive test at the time. It looks for antibodies your immune system made in response to an actual infection, not a vaccine. It's a good option if you had flu-like symptoms in the past and want to know if COVID-19 was the cause, or if you're just curious about your prior exposure history.

What's included in this test?

This test checks specifically for nucleocapsid IgG antibodies, a marker your body produces only after a real SARS-CoV-2 infection, not after spike-based vaccination. Because it targets a different part of the virus than what vaccines use, it helps distinguish natural infection from vaccine-induced immunity. This distinction matters if you want to know your actual infection history separate from your vaccination record.

What happens after I get my results?

Your results will show up in your account as either positive or negative, along with an explanation of what that means. If your result is positive, it simply confirms past exposure; there's no specific lifestyle change needed, but you can continue following standard precautions to avoid reinfection or spreading illness to others. If you're negative but still have symptoms, consider a different type of test to check for active infection. You can download the full lab report from your account any time, and if you test again in the future, you can track results side by side using the trends feature.

How can I naturally support my immune system?
Good sleep, regular movement, and a diet rich in fruits, vegetables, and lean protein all help your immune system function well. Staying hydrated and managing stress through activities like walking, stretching, or meditation also play a role in keeping your defenses strong. Avoiding smoking and limiting alcohol can further support your body's natural ability to fight off infections.
When will I get my results?
Results are typically ready within about 7 days of your sample being collected. Once processed, they'll be uploaded directly to your online account, where you can view and download them at your convenience. You'll be able to see your result status along with a plain-language explanation of what it means.
Who should consider this test?
This test is a good fit for anyone who wants to know if they've previously been infected with SARS-CoV-2, especially if they had symptoms in the past that were never confirmed with a test. It's also useful for people who want to distinguish natural infection immunity from vaccine-related immunity. If you're doing research on your own health history or just curious, this test can fill in that gap.
What symptoms indicate I may have had a past COVID-19 infection?
Common signs of a past infection include fever, cough, loss of taste or smell, fatigue, and body aches that occurred at some point in recent months or years. Some people had very mild or no symptoms at all but still developed antibodies. If any of these sound familiar and you never confirmed the cause, this test can help clarify things.
What does a positive result mean?
A positive result means your immune system has been exposed to the actual SARS-CoV-2 virus at some point and produced antibodies in response. It does not mean you currently have an active infection, and it doesn't necessarily mean you're protected from getting infected again. Since we don't fully know how long these antibodies last, a positive result is best thought of as a historical marker rather than a guarantee of ongoing immunity.
What does a negative result mean?
A negative result generally means no antibodies to the virus's nucleocapsid protein were detected, suggesting you likely haven't had a prior infection, or that antibody levels have dropped over time. It's also possible to test negative very early after infection before antibodies fully develop. If you have current symptoms and suspect an active infection, a different type of test designed to detect the virus itself would be more appropriate.
How often should I retest?
There's no routine need to retest for past infection status once you've confirmed it, since this test looks backward rather than tracking an ongoing condition. You might consider retesting if you believe you've had a new infection since your last test and want to document it. Otherwise, this is typically a one-time or occasional test rather than something to repeat regularly.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Get lab order in minutes, results come overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
SARS-CoV-2 Nucleocapsid IgG Antibody Negative
Demo results
Negative Positive
Negative

What this means

A negative result means no antibodies to the SARS-CoV-2 nucleocapsid protein were found, suggesting no prior infection was detected or antibody levels have dropped over time. This does not rule out a very recent infection, since antibodies take time to develop after exposure.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More advanced tests may take longer due to complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Find a lab near you

Search Quest Diagnostics and LabCorp locations available through Private MD Labs.

Find a lab

SARS-CoV-2 Antibody Test - Past COVID-19 Infection Check

  • Detect past coronavirus infection exposure
  • Check natural immunity from vaccine status
  • Screen your recent infection history
$702
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.
Ask Me Anything

Your 24/7 Personal Lab Guide

Hi. Tell me what you want to check. I'll find the right blood test for you.

Just now
For informational purposes only. Not medical advice.