Recommendations for the diagnosis, prevention and management of common respiratory viral infections in adults and children undergoing treatment for haematological malignancies or haematopoietic stem cell transplantation (HSCT). This guideline will focus on the following respiratory viral infections: influenza, respiratory syncytial virus (RSV), human metapneumovirus (HMPV), human parainfluenza virus (HPIV) and human rhinovirus (HRV). The management of adenovirus and opportunistic infections (notably cytomegalovirus, herpes simplex virus and varicella zoster virus), which may involve the respiratory tract, is beyond the scope of this manuscript and will not be discussed. Human coronavirus and other community acquired respiratory viruses, including bocavirus, will not be discussed due to the lack of available data in this area.The key areas covered in this guideline are: Diagnosis, Prevention and Treatment.

Declaration of Interests

The BSH paid the expenses incurred during the writing of this guidance. None of the authors had conflicts of interest to declare. All authors have made a declaration of interests to the BSH and Task Force Chairs which may be viewed on request.