Longitudinal kinetics of RBD+ antibodies in COVID-19 recovered patients over 14 months
Fig 2
SARS-CoV-2 RBD+ antibody levels at V1 by sex, age, and disease severity.
Scatter plots of RBD+ IgG/A/M levels in COVID-19 recovered patients at V1, by sex (A), age (B), and COVID-19 severity (C). Values on the y-axis are presented as the ratio between the signal obtained to the mean signal for the negative controls (cutoff) in each microwell plate (S/CO). Mean values are indicated by solid black lines. P values were determined using an unpaired, two-sided Mann-Whitney U-test; p < 0.05 was considered statistically significant. M—male; F—female; Mild—mild symptoms during the active phase of the disease; Sev—severe symptoms during the active phase of the disease.