COVID-19 Antibody Test

Serological testing detects IgM and IgG antibodies to SARS-CoV-2

COVID-19 Antibody Test

About  |  Testing Process  |  Specimen Collection  | Sample Report |  FAQs  |  How to Order 


Our COVID-19 Antibody Test can serve as a valuable tool in the fight against the disease by identifying individuals with recent or prior exposure to the virus. The test is performed on a highly sensitive chemiluminescent platform that accurately detects IgM and IgG antibodies to the novel coronavirus SARS-CoV-2, the virus known to cause COVID-19.

  • High levels of IgM antibodies tend to indicate recent exposure, and may help to confirm COVID-19 in patients showing symptoms.
  • High levels of IgG antibodies indicate a longer-term exposure and is considered by many to be an indicator of immunity.
  • This is valuable information for individuals with high exposure risk to the virus, including workers in healthcare, service industries, and others who want to better understand their risk of becoming ill with COVID-19.

Additionally, the COVID-19 Antibody Test can be used to confirm a RT-PCR COVID-19 test result, particularly when a false-negative result is suspected due to inadequate sample collection.


Assess Patient Vulnerability to COVID-19

Assess Patient Vulnerability to COVID-19

FDA-Advanced Chemiluminescence Technology

Advanced Chemiluminescence Technology

Results in 2-3 Days

Results in 2-3 Days



Testing Process

We run our COVID-19 antibody panel on a high-precision immunoassay analyzer that utilizes enzyme-amplified chemiluminescence technology (CLA). The SARS-CoV-2 IgM/IgG CLA utilizes this highly sensitive technique to detect even very small amounts of IgM and IgG antibodies for SARS-CoV-2. These machines are developed and manufactured in the US and offer the most accurate IgM and IgG coronavirus testing currently available. In a human study of COVID-19 patients,  the combined IgM + IgG test was found to have a clinical sensitivity of 95.5% and a clinical specificity of 96%.


COVID-19 Antibody Testing Process

Specimen Collection

This test requires a serum specimen. US BioTek supplies collection kits free of charge to licensed practitioners with a US BioTek account.

Collection by a standard SST is also acceptable.


View Collection Instructions


COVID-19 Antibody Test Specimen Collection

Sample Report

Our reports are straightforward and easy to read, so you and your patient can focus on follow up care. The report for our COVID-19 Antibody tests clearly indicates if IgG and IgM levels are reactive and includes important information about the test.


View Sample Report


COVID-19 Antibody Test Sample Report

Frequently Asked Questions

How long does it take to get test results?

Once the specimen has been received by our lab, you can expect test results in 2-3 days. You will be able to view the results via our online portal.

Can I use my existing US BioTek serum collection kits?

No. This test requires an SST. A standard SST can be used for collection, or US BioTek can provide collection kits.

Does this test indicate an active COVID-19 infection?

No. This test detects IgG/IgM antibodies in the blood. An Ig response signals the development of immunity and can indicate prior exposure to the virus or recovery from mild cases.

Negative results do not always rule out SARS-CoV-2 infection, particularly in those who have been in recent contact with the virus. Follow-up testing with a molecular diagnostic assay should be considered to rule out infection in these individuals

Is this test FDA-approved?

This test has not yet been reviewed by the FDA. However, it can be used in clinical laboratories by health care professionals following the FDA Policy for Diagnostic Tests for Coronavirus Disease-2019 (COVID-19) during the Public Health Emergency.

What is the sensitivity and specificity of this test?

We use a state-of-the-art, highly sensitive chemiluminescent platform to run this panel. These machines are developed  and manufactured in the US and offer the most accurate IgM and IgG coronavirus antibody testing currently available. In a human study of COVID-19 patients, the combined IgM + IgG test was found to have a clinical sensitivity of 95.5% and a clinical specificity of 96%.

Can this test be combined with the COVID-19 Diagnostic Test?

Yes. Consider combining our COVID-19 antibody and diagnostic tests if:

  • Swab collection is difficult
  • There is a history of COVID-19 symptoms, but subsequent recovery
  • You have concerns about a patient’s ability to mount an immune response to the virus

Can this test be used for children?

There is evidence that this type of test is not as accurate for children. We do not recommend using this test for children under the age of 2, or children of any age that are currently breastfeeding.

Do I need to have an account before I can order COVID-19 Antibody Tests?

Yes. We invite licensed healthcare providers to set up an account with us. Our services can be ordered by a healthcare provider who is authorized under his or her scope of practice to order tests and interpret results for the purposes of diagnosis and decisions regarding patient treatment.


Create Account


I am a patient. Can I order a COVID-19 test from you?

At this time  we are only able to offer our COVID-19 antibody test to medical providers for in-clinic use.

Why use US BioTek Laboratories?

We are a CLIA accredited medical laboratory based in Shoreline, Washington. We employ the latest laboratory technology, advanced automation, and a dedicated research team to ensure the accuracy and reproducibility of every test. We've applied 30+ years experience in laboratory science to refine and optimize the procedures we follow in our tests, resulting in more meaningful and reliable information for providers and patients. 



How to Order COVID-19 Antibody Tests


1. Create a US BioTek Account if you do not yet have one. It's easy and free of charge.


2. Request Test Kits
Already have a US BioTek account?  The next step is to make sure you have appropriate collection materials. If you have SSTs on hand, you may use these  (please review our instructions for collection and shipping). Alternatively, you can request collection kits from US BioTek. These are available free of charge to licensed practitioners with a US BioTek account.  You can request kits by clicking on the button below:


3. Get the Information you Need!

Click on the button below to request updated requisition forms, pricing information, specimen requirements, and to submit questions about our COVID-19 Antibody Test. Our team will follow up with you quickly.