CSF3 and infection: Many factors may influence the kinetics of engraftment after allo‐HSCT, including the number of HSCs and T cells, subset of T cells, infections, graft‐versus‐host disease (GVHD) prophylaxis, post‐transplant granulocyte colony‐stimulating factor (G‐CSF) administration, and the disease status.4, 6, 7, 8