The LifeDX COVID-19 Antigen Test uses a lateral flow immunochromatographic method. When the reactive sample and buffer are applied to the sample pad, the mixture moves toward the conjugate pad, which contains colloidal gold conjugated to monoclonal antibodies specific for SARS-CoV-2. The viral antigens in the sample bind to the conjugate, and this complex moves to the test zone (T), where it binds to the immobilized monoclonal antibodies, forming a visible color line.
If SARS-CoV-2 antigens are absent in the sample, no visible color line will appear in the test zone. A control line © will always appear to indicate the test is functioning correctly.