Table 2. Sensitivity and specificity of all test assays
Test Assay Sensitivity day 2–7 Sensitivity day 8–18 Overall sensitivity day 2-d18 Specificity
  IgM* IgG IgM* + IgG IgM* IgG IgM* + IgG IgM* IgG IgM* + IgG IgM* IgG
Point-of-care test                      
Corona Virus (COVID-19) Combined IgM/IgG Rapid test (Sol scientifics) 57% 14% 57% 94% 88% 94% 83% 65% 83% 79% 100%
COVID-19 IgG/IgM Rapid test Cassette (Orient Gene) 43% 29% 43% 94% 88% 94% 78% 70% 78% 100% 100%
SARS-CoV-2 Ab rapid test (Wantai) n.a. n.a. 43% n.a. n.a. 94% n.a. n.a. 78% n.a. 100%
COVID-19 IgG/IgM RAPID TEST (PRIMA PROFESSIONAL) 0% 29% 29% 50% 81% 88% 35% 65% 70% 95% 100%
Diagnostic Kit for IgG/IgM Antibody to SARS-CoV-2 (WIZ BIOTECH) 14% 14% 14% 94% 94% 94% 70% 70% 70% 95% 100%
Enzyme-Linked Immunosorbent Assay (ELISA)                      
Anti-SARS-CoV-2 (EUROIMMUN)* 57% 29% 57% 94% 88% 94% 83% 70% 83% 95% 100%
Novel Coronavirus COVID-19 (Epitope Diagnostics) 29% 71% 71% 69% 94% 94% 57% 87% 87% 95% 89%
SARS-CoV-2 IgG ELISA Kit (Creative Diagnostics) 29% 14% 29% 94% 88% 94% 74% 65% 74% 100% 100%
Human Anti-2019 nCoV(N) IgG ELISA kit (Finetest) n.a. 29% n.a. n.a. 88% n.a. n.a. 70% n.a. n.a. 83%
Chemiluminescent microparticle immunoassay (CMIA)                    
SARS-CoV-2 IgG (Abbott) n.a. 29% n.a. n.a. 88% n.a. n.a. 70% n.a. n.a. 100%
Chemiluminescence immunoassay (CLIA)                      
Liaison SARS-CoV-2 S1/S2 IgG (DiaSorin) n.a. 0% n.a. n.a. 81% n.a. n.a. 59% n.a. n.a. 100%
Anti-SARS-CoV-2 (EUROIMMUN)*: IgA instead of IgM; n.a.: not applicable