Want to know if you had COVID-19?

T cells have the answer.

Want to know if you had COVID-19?

T cells have the answer.

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How it works

Order Patient

1. Order

Answer some eligibility questions and submit payment.
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Account Set Up

2. Test authorization

An independent healthcare provider will review your responses and, if appropriate, authorize your test.

Blood Draw

3. Blood draw

A certified phlebotomist will draw your blood.


4. Results

Adaptive will process the blood sample and share results with you via a secure email from PWNHealth.

Estimated time for test results is 7-10 days from shipment of the blood sample (including 5-7 days for lab processing*).

Adaptive has partnered with PWNHealth, an independent healthcare provider network, to authorize tests, when appropriate.

*Lab processing begins once all required provider and patient information is validated.

Why T cells?

  • T cells are the first responders of the adaptive immune system.
  • T cell responses can persist in the blood long after antibody responses wane.1, 2
  • High Specificity: Each T cell recognizes a very specific piece of the virus. All of your T cells together (your T cell response) can see many parts of the virus. Most antibody tests only look for one part of the virus (e.g. Spike protein).3
  • In a study, T cell responses were detected up to 10 months after initial COVID-19 infection with 90% sensitivity.4

Time since infection

Time Since Infection 0621

* Based on prior research on other coronavirus T cell response. 2, 5

Patients Specificity Data

Specificity is the ability of a test to correctly determine if a person does not or did not have the disease.

T cells vs. antibodies

In some studies, T cell testing outperformed leading antibody tests.6,7


Patients Data Sensitivity

Sensitivity based on positive percent agreement (PPA) with PCR testing.
Sensitivity is the ability of a test to correctly determine if a person has or had the disease.


  1. Tay MZ, et al. The trinity of COVID-19: immunity, inflammation and intervention. Nat Rev Immunol. 2020.
  2. Ng O, et al. Memory T cell responses targeting the SARS coronavirus persist up to 11 years post-infection. Vaccine. 2016.
  3. Zuo J, et al. Robust SARS-CoV-2-specific T-cell immunity is maintained at 6 months following primary infection. bioRxiv. 2020.
  4. Data on file. Adaptive Biotechnologies. 2021.
  5. Channappanavar R, et al. Virus-specific memory CD8 T cells provide substantial protection from lethal severe acute respiratory syndrome coronavirus infection. J Virol. 2014.
  6. Dalai, S, et al. Clinical Validation of a Novel T-cell Receptor Sequencing Assay for Identification of Recent or Prior SARS-CoV-2 Infection. medRxiv. 2021.
  7. Elyanow R., et al. T-cell receptor sequencing identifies prior SARS-CoV-2 infection and correlates with neutralizing antibody titers and disease severity. medRxiv. 2021.

For Physicians

T-Detect COVID can capture past COVID-19 infections that may be missed by serology testing.

Learn more

For Employers

T-Detect COVID may help your employees get the answers they need.

For Researchers

T-Detect COVID can support your research due to its high sensitivity and specificity.

* T-Detect COVID is not FDA cleared or approved. It is authorized for emergency use under an Emergency Use Authorization.

This test has not been FDA cleared or approved but has been authorized for emergency use by FDA under an EUA.

Testing of venous whole blood using K2 EDTA specimens is limited to laboratories designated by Adaptive Biotechnologies Corporation that are certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA), 42 U.S.C. §263a, and meets the requirements to perform high complexity tests as described in the T-Detect COVID Test Standard Operating Procedure that was reviewed by the FDA under this EUA.

This test has been authorized only for detecting and identifying the presence of an adaptive T-cell immune response to SARS-CoV-2, not for any other viruses or pathogens.

The emergency use of this test is only authorized for the duration of the declaration that circumstances exist justifying the authorization of emergency use of in vitro diagnostics for detection and/or diagnosis of COVID-19 under Section 564(b)(1) of the Federal Food, Drug and Cosmetic Act, 21 U.S.C. § 360bbb3(b)(1), unless the declaration is terminated or authorization is revoked sooner.

T-Detect™ COVID is not indicated for use in patients under age 18.