Skip to main content
. 2021 Apr 2;10(1):664–676. doi: 10.1080/22221751.2021.1905488

Figure 5.

Figure 5

. Correlation between HCoV-OC43 antibody titres and disease severity in COVID-19 patients’ plasma after SARS-CoV-2 S protein competition. (A) HCoV-OC43 S-IgG antibody levels in plasma samples taken from COVID-19 patients pretreated with 0.5% bovine serum albumin (BSA) or SARS-CoV-2 S protein, respectively. Red and black dotted lines in violin denote the median and interquartile range of antibody titres, respectively. Two-tailed Wilcoxon matched-pairs signed-rank test was used for comparison of antibody titres. (B–C) HCoV-OC43-S-IgG levels in patients with mild and severe symptom (B), in patients with mechanical ventilation and non-mechanical ventilation (C) over time post symptom onset after competition using SARS-CoV-2 S protein. Non-parametric Mann-Whitney test was used for comparison of antibody titres. (D–F) The correlation between HCoV-OC43 S-IgG titres and disease severity (mild and severe) (D), mechanical ventilation and non-mechanical ventilation (E), survivor and non-survivor (F) in patients aged 60–85 years at days 1–10 post symptom onset (PSO) after competition using SARS-CoV-2 S protein. The antibody titres in (B–F) were shown as mean with SD. The correlation was assessed by Spearman’s rank correlation test.