. 2021 Sep 8;9(2):e00458-21. doi: 10.1128/Spectrum.00458-21

TABLE 1.

Summary of COVID-19 PCR⁺ specimens from IgG and IgM ELISAs demonstrating the concordance of IgG and IgM antibody results for 55 COVID-19 PCR⁺ patients

IgM ELISA				IgG ELISA
All⁺^a	S⁺			All⁺^a	S⁺
All⁺^a	RBD⁺N⁻	RBD⁻N⁺	RBD⁻N⁻	All⁺^a	RBD⁺N⁻	RBD⁻N⁺	RBD⁻N⁻
8 (15%)	20 (36%)	1 (2%)	7 (13%)	43 (78%)	1 (2%)	3 (5%)	2 (4%)

S⁺, RBD⁺ and N⁺ indicate antibody positive and S⁻, RBD⁻, and N⁻ indicate antibody negative. All⁺, indicates antibody positive for S, RBD, and N. Results shown are the numbers of positive specimens in their respective subgroups and the percentage from the total number.