highly significantP < 0.0001
Comparing the titer of IgG directed against the RBD of the spike glycoprotein of the SARS-CoV-2 (anti-RBD IgG) measured with chemoluminescence assay and the neutralizing capacity of the serum, we observed a highly significant ( P < 0.0001) and strong ( r 2 = 0.67) positive correlation ( Figure 3 g).