Novel Coronavirus ((SARS-CoV-2) Antigen in the population Oropharyngeal swabs or Nasopharyngeal swab samples are qualitatively detected by the colloidal gold method. After mixing the population Oropharyngeal swabs or Nasopharyngeal swabs, the new Coronavirus (SARS-CoV-2) Antigen in the population will be tested SARS-CoV-2 Antigen-SARS-CoV-2 is combined with the novel coronavirus (SARS-CoV-2) antibody labeled with colloidal gold on the binding pad to form the antibody-colloidal gold complex. Due to chromatography, SARS-CoV-2 Antigen- The SARS-CoV-2 antibody-colloidal gold complex diffuses across the nitrocellulose membrane. Within the detection line area, the SARS-CoV-2 Antigen-antibody complex binds to the antibody contained within the detection line area. Antibody 2 diffuses into the quality control line (C) region and is captured by sheep anti-mouse IgG to form red bands.