SARS-CoV-2(19) COVID-19(11) determine(10) pandemic(10) Viral(9) ELISA(9) COVID-19 infection(8) individual(7) coronavirus(6) RBD(6) Protein(6) Spike protein(6) binding(6) Diagnosis(6) Patient(6) SARS-CoV-2.(5) no significant differences(5) Epitopes(5) life-threatening(5) linear epitopes(5) enzyme-linked immunosorbent(5) structural proteins(5) conformational(5) epitope(5) Amino acid(5) Immunotherapy(5) IgG response(5) SARS-CoV-2 virus(5) enzyme(5) peptide pools(5)