 Cytomegalovirus CMV and adenoviruses infections are a major source of morbidity and mortality after allogenic haematopoietic stem cell transplantation HSC. Conventional antiviral therapy have sometimes insufficient efficiency and a significant potential toxicity. Over the last ten years, adoptive immunotherapy has demonstrated its efficiency in treatment of viral infections in this context. Different methods have been used but organizational and technological barriers have prevented a wide use of this therapeutic approach. 