2.6 Statistics
Statistical analysis was performed using the GraphPad Prism software, version 8.0.1. Data was presented as Mean±Standard Error of Mean (SEM). Wilcoxon Test was used to determine statistical significance of immunological response to wild type and delta spike proteins between same individuals of naïve vaccinees and convalescent vaccinees groups. Mann-Whitney U test was used to compare statistics between naïve vaccinees and convalescent vaccinees including cytokine profile from multiplexing and neutralisation assay. Spearman’s rank correlation coefficient was used to measure the correlation between two different variables. P values less than 0.05 were considered significant (*P < 0.05, **P < 0.01, ***P< 0.001, ****P < 0.0001).