mytest® covid-19 ag is an immunoassay for the qualitative determination of covid-19 antigen in human nasopharyngeal swab. mytest® covid-19 ag test is an in - vitro immune chromatographic, one step assay designed to detect covid-19 antigen in human nasopharyngeal sample. mytest® covid-19 ag test kit contains the following items to perform the assay. 1. mytest® covid-19 ag device individually foil pouch with a desiccant. 2. extraction buffer vials 3. extraction tube 4. nozzle cap 5. sterile swab for sample collection 6. package insert