“…SFTPB deficiency is associated with various lung diseases, such as fatal respiratory failure, idiopathic pulmonary fibrosis, allergic pneumonia, chronic obstructive pulmonary disease, and acute respiratory distress syndrome. 31 , 32 Therefore, it can be inferred that SFTPB might be a potential biomarker for early and later monitoring of pulmonary long COVID. In contrast, persistent GGO lesions may turn into fibrous stripes, as observed in the newly emerged pulmonary long COVID cases in our cohort.…”