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(A) IgG concentrations against the recombinant SARS-CoV-2 Nucleocapsid protein. (B) IgG concentrations against the recombinant SARS-CoV-2 Spike protein. (C) IgG concentrations against the SARS-CoV-2 receptor binding domain (RBD) (S1) S-protein. (D) IgG concentrations against the recombinant SARS-CoV-2 Spike S2 Subunit protein.
