Co-virion Rapid Antigen Test is an immunochromatographic test designed to qualitatively detect SARS-CoV- 2 antigen in nasopharyngeal geal swab specimens. It is intended to aid in the rapid diagnosis of SARS-CoV-2 infections. Co-virion Rapid Antigen Test is an immunochromatographic test designed to detect the nucleocapsid protein of SARS-CoV-2 in nasopharyngeal swabs (NP). The test strip contains colloidal-gold conjugated particles with monoclonal antibodies against the nu- cleo- capsid protein of SARS-CoV-2. The capture antibodies for nucleocapsid protein of SARS-CoV-2 are coated on the nitrocellulose membrane. When the sample is applied to the sample window (S well), the conjugates dried in the reagent pad are dissolved and migrate along with the sample. If SARS-CoV-2 is present in the sample, a complex formed between the anti-SARS-CoV-2 conjugate and the virus will be captured by the specific an- ti-SARS-CoV-2 monoclonal antibodies coated on the test line region (T), which develops a red line in T region. Presence of T line indicates a positive result. There is also an internal control line to check the accuracy of the test performance. The control line is coated with goat anti-Rabbit IgG antibody which binds to the gold labeled antibody. Failure to form C line confirms the incorrect procedural technique.