Neocrown self-test paper cannot be used further after staining, which may lead to inaccurate self-test results, and it is recommended that the test paper be replaced with a new one.
Neocrown self-test paper usually refers to the paper in the Neocrown antigen test kit, which contains antibodies to the Neocrown virus that produce an antigen-antibody reaction with the Neocrown virus surface proteins.
The Neocoronavirus antigen test is a colloidal gold method. When the Neocoronavirus antigen test paper becomes haloed, it may cause the antibody at the haloed area to fail, so that it cannot accurately react with the viral proteins in the sample, resulting in inaccurate test results.
Therefore, it is recommended not to use the New Crown Antigen test paper when it is found to be stained. You can replace the kit with a new one and check that the test paper in the kit is intact before carrying out the antigen test.