outbreak were included. Their characteristics, ICU course, management, and outcome were evaluated. RESULTS: Fourteen subjects, including 3 health-care workers, met study criteria. Besides 2 health-care workers, all subjects had comorbidities. Predominant symptoms were fever, cough, and dyspnea. The worst median P aO 2 /F IO 2 ratio of 118 post-intubation was seen on the third day, and median APACHE II score was 27. All subjects received lung-protective ventilation and 1 mg/kg/d methylprednisolone infusion for ARDS. Eleven subjects received ribavirin and peginterferon ␣-2a. Subjects had a critical ICU course and required neuromuscular blockade (n ؍ 11; 79%), required rescue therapy for respiratory failure (n ؍ 8; 57%), developed shock (n ؍ 10; 71%), and required renal replacement therapy (n ؍ 8; 57%). Declining C-reactive protein levels correlated with clinical improvement despite continued positive real-time polymerase chain reaction results. Nine subjects died in ICU. Five subjects, including 3 health-care workers, were discharged from hospital and were alive after 1 y. CONCLUSIONS: Middle East Respiratory Syndrome coronavirus pneumonia with ARDS has high mortality in subjects with comorbidities. The mainstay of treatment is meticulous ARDS management. Those who survived the acute infection and its complications remained well after 1 y in our study. The role of ribavirin and interferon warrants urgent further evaluation.