“…In patients with haematological malignancies (HM), plenty of factors, including dose-intensive chemotherapy and haematopoietic stem cell transplantation (HSCT), may cause severe and persistent neutropenia, resulting in the risk of a compromised immune system and increased susceptibility to opportunistic and life-threatening bacterial and fungal infections. Granulocyte transfusions (GTx), which have been in use for more than 50 years, seem to be a sensible therapeutic approach to this problem [1,2]. The theoretical potential for granulocyte transfusion was established by early animal studies, which showed that granulocytes transfused to neutropenic dogs were of normal appearance and viability and migrated to the sites of infection [3].…”