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Prevalence of antibodies in first (Light blue) and second serum samples (dark blue). (a). Antiphospholipid antibodies. (b). Anti-SARS-CoV-2 antibodies. Classic aPL: Anti-Cardiolipin or anti-B2GPI (aB2GPI) of isotypes IgG/M. Anti-B2GPI IgA (aB2GPI IgA), anti-PS/PT (aPS/PT): Anti-phosphatidylserine/prothrombin antibodies of IgG/M isotypes.
