Cov khoom siv no yog npaj rau hauv vitro qualitative detection ntawm SARS-CoV-2 IgG antibody hauv tib neeg cov qauv ntawm cov ntshav / ntshav, ntshav venous thiab cov ntshav ntiv tes, suav nrog SARS-CoV-2 IgG antibody nyob rau hauv ib txwm muaj kab mob thiab tshuaj tiv thaiv kab mob.