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. 2021 Jan 4;12:63. doi: 10.1038/s41467-020-20247-4

Fig. 3. Longitudinal antibody responses (PRNT90, PRNT50, and ELISA) in COVID-19 patients by days after illness onset and severity, Hong Kong.

Fig. 3

Data from 61 patients with multiple samples for PRNT90 and PRNT50 antibody titers and 54 patients with multiple samples for ELISA. Small random noises were added to the PRNT90 and PRNT50 titers for better presentation. The thick lines showed the fitted values and shaded areas showed the 95% confidence intervals. Neutralization and ELISA assays were carried out in duplicate.