SARS-CoV-2Antigen Rapid Test Kit (TRFIA) is an immunofluorescent sandwich assay.The detection of SARS-CoV-2 nucleocapsid protein antigen can be used to assist the diagnosis of novel corona virus infection, and is helpful for the early detection of novel corona virus pneumonia infection in the latent period.The test strip contains membranes which are pre-coated with mouse anti-CoV N protein monoclonal antibodies on the test lines. When the sample is applied to the sample wells, SARS-CoV N protein and labeled antibody complexes are formed and travel up the strip. The labeled microsphere fluorescent probe reagent is used to form a visible red line with matched UV flashlight. The presence of SARS-CoV-2 will be indicated by a visible red test line (T) in the result window. Membrane is pre-coated with Chicken IgY on the control(C)line. Control(C)line appears in each result window when sample has flowed through the strip. The Control Line is used as a procedural control. The control line should always appear when the test procedure is performed properly and the reagents are working as intended. Rapid antigen tests are a diagnostic tool, but not meant to confirm an active infection or prevent transmission among people who don’t have symptoms. They are intended for people with symptoms of COVID-19, people who are a close contact of a confirmed COVID case, and for tracking people who are part of an outbreak.