Overall survival by day 90 according to HCoV LRTI categories among patients with first HCoV LRTI (N = 53). (A) Kaplan-Meier estimate of overall survival by LRTI categories (proven/probable vs possible LRTI; P < .01). (B) Kaplan-Meier estimate of overall survival according to LRTI categories (proven/probable vs possible LRTI) with oxygen requirement at LRTI diagnosis (P = .03).