For predicting death due to infection after day 100 with multivariate analysis, the factors determining the outcome were age at alloHCT, gender (with male gender as a risk factor), GvHD prophylaxis group MM/ATLG (with belonging to this group as a risk factor), GvHD prophylaxis group PTCY (with PTCY as a protective factor), and the maximum count of B- and CD4+ T-cells reached from day 0–100. Here, CD4 is linked to infection.