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Baseline CRFs and ARTIs leading to hospitalization (main study). (A) Percentage of patients with CRFs at baseline and (B) ARTIs reported by patients leading to hospitalization. ARTI, acute respiratory tract infection; COPD, chronic obstructive pulmonary disease; CRF, core risk factor; RSV, respiratory syncytial virus. †Other ARTIs primarily consisted of viral influenza‐like ARTIs.
