COVID-19(40) SARS-CoV-2(34) Patient(19) specificity(15) plasma(15) specimen(15) antibody(14) IgG(13) receiver operating characteristic(12) cutoff value(12) sensitivity(12) material(11) enzyme-linked immunosorbent(11) enzyme-linked immunosorbent assay(11) IgM(11) ELISA assay(11) enzyme(11) SARS-COV-2 infection(11) ELISA(11) nucleocapsid(10) virus(10) positive(10) Accuracy(10) individual(9) Blood(9) Result(9) detection(8) evaluated(8) patients with COVID-19(8) diagnosis of COVID-19(8)