Result(39) SARS-CoV-2(34) supplementary material(31) COVID-19(28) COVID-19 patients(21) positive(20) ELISA(18) Patient(18) virus(18) correlation(16) COVID-19 patient(16) antibody(16) Quantitative(13) significantly(13) inactivated(12) Chain Reaction(12) reveal(12) investigated(12) neutralizing antibody(11) Protein(11) SARS-CoV-2 spike protein(11) serum samples(11) Spike protein(11) viruses(10) coronavirus(10) Critical(10) Concentration(10) Viral(10) Prevalence(10) Sensitivity and specificity(9)