Specifically, three blood indicators, i.e., hemoglobin (HGB), platelets (PLT), and lymphocytes (LY) of death cases were significantly lower compared to normal infection cases during convalescence (Fig. 6A), while four coagulation indicators, i.e., prothrombin time (PT), international normalized ratio (INR), D-Dimer, and thrombin time (TT) showed significantly higher values in death cases than in normal infection cases (Fig. 6B), indicating weaker immunity and higher risk of bleeding. Here, F2 is linked to infection.