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Seroprevalence of anti-SARS-CoV-2 neutralizing Ab in IgG/IgM-positive individuals. Ab: antibody; IgG+: anti-SARS-CoV-2 IgG positive; IgG−: anti-SARS-CoV-2 IgG negative; IgM+: anti-SARS-CoV-2 IgM positive; IgM−: anti-SARS-CoV-2 IgM negative.
