Extended Data Fig. 4: Ab responses in a healthcare worker cohort.
a, Ab responses (IgG and IgM to S glycoprotein, RBD and N protein) over time. Each line represents one individual. Asymptomatic individuals shown in green, symptomatic individuals shown in black and PCR+ HCW shown in red (for comparison). The dotted line represents day 0 POSs. b, Correlation of ID50 with IgG and IgM OD values against S glycoprotein and N protein (Spearman correlation, r). A linear regression was used to calculate the goodness of fit (r2). The ELISA assays were conducted once. A subset of neutralization experiments were conducted twice yielding similar results.
