Ukutholwa kwekhwalithi nokuhlukaniswa kwama-antibody e-IgM ne-IgG ku-SARS-CoV-2 ku-serum, i-plasma (i-EDTA, i-sodium citrate ne-lithium heparin) noma i-fingerstick igazi lonke, ama-specimens egazi aphelele avela ezigulini ezisolwa ngokutheleleka nge-COVID-19 ngumhlinzeki wezokunakekelwa kwempilo.