Safety Study of ADV-specific T-cells in Paediatric Patients Post Allo-HSCT

"A single dose 1x10e4 CD3+ T cells/kg patient weight of Cytovir ADV is prescribed to patients on exhibiting two consecutive PCR positive Adenovirus viraemia results \> 1000 copies/ml. Patients are followed up by continued monitoring of Adenovirus viraemia results. If patients exhibit uncontrolled ADV viraemia at ≥ 4 weeks following the first cell dose, they will be prescribed a second cell dose of 10e5 CD3+ T cell/kg. Patients will be monitored for 6 months following infusion of Cytovir ADV.~This is a feasibility/pilot study and has no control group"