Fig. 3: Correlations of binding antibodies with neutralizing antibodies (NAbs) in mild/moderate and severe patients.
From: The kinetics of humoral response and its relationship with the disease severity in COVID-19

a The correlations of appearance time between antibodies against spike (S) and receptor-binding domain (RBD) proteins with NAbs. The x-and y-axis are the number of days when the antibody was detected after symptom onset. b Associations of anti-S and anti-RBD antibodies levels expressed as optical density (OD) value with NAbs titers in the mild/moderate and severe patients. c The correlations of NAbs titers with the antibodies against S and RBD proteins during the disease course.