Probability of overall survival and respiratory death by presence of pathogens. (A) Kaplan-Meier estimate of overall survival by presence of pathogens. One patient with ciHHV-6 was included in the IPS cases without pathogens. (B) Cumulative incidence of respiratory death by presence of pathogens. (C) Kaplan-Meier estimate of overall survival by pathogen type (aHR for established vs uncertain, 0.83 [0.41-1.69]; P = .61). (D) Cumulative incidence of respiratory death by pathogen type (aHR for established vs uncertain, 0.73 [0.33-1.61]; P = .44).