Fig. 1.

Flow chart for patient inclusion criteria. HR high risk, hMPV human metapneumovirus, ICU intensive care unit, MV mechanical ventilation, RSV respiratory syncytial virus. ^aThe total study cohort includes patients diagnosed in inpatient, outpatient, or other Medicare settings. ^bPatients who did not use services in the ICU or MV during the index hospitalization. ^cPatients who used services in the ICU during index hospitalization; ICU and MV are not mutually exclusive. ^dPatients who used MV during index hospitalization; ICU and MV are not mutually exclusive. ^ePatients who used supplemental oxygen during index hospitalization