Purpose This test kit is used for making qualitative test for COVID-19 antigen in human nose swab and throat swab samples. It acts as an early-stage aided diagnostic kit for clinical patients infecting COVID-19, yet it does not stand for the basis for confirming COVID-19. Sample requirements When using sterile swab for collecting samples, polyester sponge swab with PP bar is recommended when collecting nose swab and throat swab. When collecting nose swab, the swab will be gently inserted into the nose palatine and stay for a moment, and then gradually rotate it until it is taken out. When collecting throat swab, the swab will be completely inserted into the throat from the mouth, then inspectors will wipe pharyngeal tonsil on both sides and posterior wall of pharynx with appropriate strength, and finally take the swab out. During this process, please avoid touching the tongue. After collecting the samples, please make processing with viral transport medium or sample diluent provided in the test kit as soon as possible, and complete test within five minutes. Test principle This test kit adopts the principle of high-specificity antigen-antibody reaction and colloidal gold labelling and immunochromatographic test strip techniques. The reagent contains COVID-19-NP antigen monoclonal antibody pre-fixed in film test area and COVID-19-NP antigen monoclonal antibody-colloidal go