Figure 2 Kaplan-Meier survival curves of patients with COVID-19. (A) Survival curve of patients receiving single-agent antiviral therapy and those receiving combination antiviral therapy (P=0.004). (B) Survival curve of patients receiving single-agent anti-infection therapy and those receiving combination anti-infection therapy (P<0.001). (C) Overall survival for all patients based on administration of gamma globulin therapy (P<0.001). (D) Overall survival for all patients based on receiving other supportive treatment (Chinese medicine or other) (P=0.048).