IL6 and COVID-19: IL-6 was significantly higher in both severe COVID-19 ICU patients [21.3 pg/ml, 5-95% percentile; 1.94-3612 pg/ml; p=0.0014)] and in non-ICU patients [9.25 pg/ml, 5-95% percentile; 1.94-58.9 pg/ml; p=0.0135)] compared with healthy subjects (Table 2, Figure 1E).