(A) ELISA endpoint titers for serum binding against SARS-CoV-2 receptor binding domain (RBD), Spike (S), and nucleoprotein (NP) recombinant protein from a cohort of acutely infected individuals (n=46). Significance is calculated by Brown-Forsythe ANOVA test. *p≤0.05, **p≤0.01 (B) IgG binding titers against RBD, Spike, and NP correlated with SARS-CoV-2 serum neutralization activity. The coefficient of determination (r2) is reported following linear regression analysis.