IL2 and COVID-19: Similarly, IL-2 was also highest in deceased COVID-19 patients followed by patients who survived and healthy controls [Med: 0.79 pg/mL (IQR: 0.39–0.97) vs 0.29 pg/mL (IQR: 0.19–0.44) vs 0.23 pg/mL (IQR: 0.22–0.27), respectively, Kruskal–Wallis, P < 0.05], though the only significant pairwise comparisons were between the deceased and healthy (P = 0.035) and deceased and survived (P = 0.018) groups (Fig. 1B).