aGVHD delays the recovery of a fully diverse T-cell repertoire. Diversity of the T-cell repertoire was measured using Immunoscope before and 3, 6, 12, and 24 months after transplantation, in the PBMC of patients with (, plain gray lines) or without aGVHD (●, dotted black lines). Mean percentage ± SE of oligoclonal (A) or polyclonal (B) BV families was represented. *P < .05.