In this study, we collected various demographic and clinical data of patients, including gender; age; duration of illness; use of CS; organ involvement; duration of treatment; presence of respiratory tract infection; and various clinical laboratory indices, such as WBC count, neutrophil (NEU) count, lymphocyte (LYM) count, platelet (PLT) count, MPV, RBC count, hemoglobin (HGB) level, monocyte (MONO) count, eosinophils (EOS) count, basophils (BAS) count, and CRP. The gene discussed is CRP; the disease is Respiratory tract infection.