The main factors associated with thrombosis were coma, aseptic meningitis, platelets ≤ 103 × 109/L, D-dimer > 3778 ng/mL, ferritin > 594 ng/mL, LDH > 382 U/L, and elevation of NT-proBNP (Table 2). Here, NPPB is linked to aseptic meningitis.