主题词：Renal Transplantation Outcomes and Treatments; Organ Transplantation Techniques and Outcomes; Organ Donation and Transplantation; Transplantation: Methods and Outcomes; Liver Disease and Transplantation; Renal and Vascular Pathologies; Organ and Tissue Transplantation Research; Cytomegalovirus and herpesvirus research; Dialysis and Renal Disease Management; Renal Diseases and Glomerulopathies; Pancreatic function and diabetes; Hepatocellular Carcinoma Treatment and Prognosis; Xenotransplantation and immune response; Viral-associated cancers and disorders; COVID-19 Clinical Research Studies; T-cell and B-cell Immunology; SARS-CoV-2 and COVID-19 Research; Liver Disease Diagnosis and Treatment; Mechanical Circulatory Support Devices; Chronic Kidney Disease and Diabetes; Hepatitis C virus research; Polyomavirus and related diseases; Hematopoietic Stem Cell Transplantation; Complement system in diseases; Blood donation and transfusion practices