F2 and COVID-19: The aim of the study was to investigate role of coagulation parameters namely prothrombin concentration (PC), activated partial thromboplastin time (aPTT), D-Dimer (DD), anti-thrombin III (ATIII) and fibrinogen (Fg) together with hematological, and biochemical parameters in predicting the severity of COVID-19 patients and estimating their relation to clinical outcomes in hospitalized and severe COVID-19 Patients.