Immune recovery at last follow-up in relation to donor source. (A) Levels of absolute lymphocytes and CD3, CD4, CD8, and CD19 cells at last follow-up. (B) Proportion of CD3 recovery > 1000 cells/mm³ and CD4 recovery > 300 cells/mm³ at 6 months, 1 year, and 2 years after HCT. (C) Time to achieve a normal PHA response after different donor type.