TBG SARS-CoV-2 Neutralizing Antibody Qualitative Rapid Test(colloidal gold) Now with the detection before and after vaccination, TBG''s company has a neutralizing antibody detection reagent, that it can be used as the effective rate detection of antibody before and after vaccination. No matter how the vaccine is administered, The Neutralizing Antibody Qualitative Rapid Test will be used. Our test kits for COVID-19 as below are still effective to detect the infection of new COVID-19 variant B.1.1.7and The new variant has no effect on the detection performance of products