Absolute lymphocyte counts (7, 14 and 28 days), serum level of CRP, PCT and IL‐6 (3, 7 and 14 days), SOFA score (7 days), all cause mortality rate (28 days), ventilation free days (28 days), ICU free days (up to 28 days)  NCT04268537/Not yet recruiting, Feb10‐Oct31 2020