CTL cytotoxic T lymphocyte GVHD graft-versus-host disease HLA human leukocyte antigen IFN interferon IL interleukin MIP-1β macrophage inflammatory protein-1 beta PBMC peripheral blood mononuclear cell SCT stem cell transplantation TNF tumor necrosis factor UMAP uniform manifold approximation and projection VST virus-specific T cell 1 Introduction BK virus, also known as human polyomavirus 1, was first isolated from the urine of a kidney-transplant recipient in 1971 and remains a clinically...
