VWF and Thrombocytopenia: Analysis of coagulation factors in NiV-B non-survivors demonstrated an increase in partial thromboplastin time (PTT) and thrombin time (TT), while fibrinogen and von Willebrand factor (VWF) antigen levels were elevated in both NiV-M and NiV-B non-survivors; these data correlated with the development of thrombocytopenia (Fig 4C).