Fig. 7.

Changes in the occurrence rate of patients seropositive for immunoglobulins of various classes and subclasses specific to SARS-CoV-2 antigens in groups of patients with differing severity of COVID-19. (A) – occurrence rate (%) of patients seropositive for class M, A, and G immunoglobulins specific to NTD, RBD, RBD-SD1 antigens and the N-protein in the groups of patients with differing severity of COVID-19. (B) – occurrence rate (%) of patients seropositive for subclass G and A (C) immunoglobulins specific to RBD (CHO) and RBD-SD1 antigens and the N-protein in groups of patients with differing severity of COVID-19