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; T-cell and B-cell Immunology; Renal and Vascular Pathologies; Cytomegalovirus and herpesvirus research; Immune Cell Function and Interaction; Organ and Tissue Transplantation Research; Liver Disease Diagnosis and Treatment; Polyomavirus and related diseases; Renal Diseases and Glomerulopathies; Pancreatic function and diabetes; Neurological Complications and Syndromes; Hepatitis C virus research; Viral-associated cancers and disorders; Xenotransplantation and immune response; Complement system in diseases; Immunotherapy and Immune Responses; Dialysis and Renal Disease Management; COVID-19 Clinical Research Studies; Pregnancy and Medication Impact; Hepatocellular Carcinoma Treatment and Prognosis; Mechanical Circulatory Support Devices