CD4 and graft versus host disease: In contrast, acute GvHD and subsequent use of corticosteroids had no impact on γδ T‐cell and Vδ2+ T‐cell immune recovery (Supplementary figure 3) but were associated with an impaired long‐term immune reconstitution of lymphocytes, CD3+ T cells, CD4+ T cells and CD8+ T cells (Supplementary figure 3).