I would say that in our clinic, 75% of patients were never hospitalized,” Gutierrez said. AdThat’s why she was thrilled last week when the FDA approved the T-Detect COVID test, a brand new technology developed by the company Adaptive Biotechnologies in a partnership with Microsoft. The test uses T-cells, the immune system’s so-called black boxes of information, to diagnose patients with COVID-19. She said she is in conversations with colleagues in the field about how they can use these tests for their own patients. To learn more about the T-Detect test or to order one, head to the company’s website.