Figure 2:

(A) Percentage of seropositive KTRs (anti-spike antibody titre >50 AU/mL) in each patient cohort. (B) Box plot for anti spike SARS-CoV-2 antibodies for different cohorts. Anti-spike antibody levels (AU/mL) were measured for cohort 1 (post-COVID-19 non-vaccinated), cohort 2 (post-COVID-19 single-dose vaccinated), cohort 3 (post-COVID-19 two-dose vaccinated) and cohort 4 (COVID-19-naïve two-dose vaccinated). For cohort 4, seropositive responders (anti-spike antibody titre > 50 AU/mL) and non-responders (anti-spike antibody titre <50 AU/mL) were analysed separately. *P-value < 0.05 is significant.