Figure 1.

Flow chart showing the study population, with clinical data and blood samples collected from 2 cohort studies. Further details of the 2 trials are provided in the “Methods” section. Blood samples were collected at 3 time points during hospitalization, and at outpatient follow-up after 3 months. A subset of patients from cohort 1 also underwent pulmonary function assessment and chest CT imaging at follow-up. Abbreviations: CT, computed tomography; Dlco, diffusing capacity of the lungs for carbon monoxide; PCR, polymerase chain reaction; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.