Abstract Background Cytomegalovirus (CMV) remains the most common viral infection after hematopoietic stem cell transplantation (HSCT).The clinical significance of different CMV DNA forms remains unclear, particularly regarding CMV-specific immune reconstitution. Methods A total of 76 HSCT recipients were enrolled. A quantitative DNase I–resistant CMV-DNA assay was performed to distinguish infectious from non-infectious CMV DNA. Based on DNase treatment results, patients were divided into three
