Ho lemoha boleng le phapang ea lithibela-mafu tsa IgM le IgG ho SARS-CoV-2 ho serum, plasma (EDTA, sodium citrate le lithium heparin) kapa monoana oa mali o felletseng, lisampole tsa mali tse tsoang mali ho tsoa ho bakuli ba belaelloang ke ts'oaetso ea COVID-19 ke mofani oa tlhokomelo ea bophelo.