Impact of impaired pulmonary function on clinical outcomes in survivors of severe COVID-19 without pre-existing respiratory disease

8,389/ Brazil (est. current tobacco smoking age 15+ was 13.1% in 2020) CFS=current or former smoker Of 95 hospitalized for severe COVID-19 pneumonia & discharged alive, CFS=36.8% 42 with a restrictive ventilatory defect at follow-up: CFS=24.4% htt