The collected information includes the following: (1) Baseline data: gender, age, height, weight and body mass index (BMI); (2) information on infectious diseases of the kidney transplantation recipients; (3) laboratory testing indicators: white blood cell count (WBC), neutrophil count (NEUT), monocyte count (MO), lymphocyte count (LYM), platelet count (PLT), mean platelet volume (MPV), red cell distribution width-standard deviation (RDW-SD), albumin (ALB). Here, ALB is linked to infectious disease.