The clinical trial is designed as a single institution, open label, non-randomized Phase I trial of MVSTr in transplant recipients, designed as a single cohort Phase I study. Safety will be monitored continuously for a period of 6 weeks post MVSTr transfer. The primary safety endpoint will be the occurrence of dose limiting toxicity (DLT), defined as the occurrence of Grade IV GVHD, Grade III cytokine release syndrome (CRS), Grade III autoimmunity or any other SAE that is deemed to be at least probably or definitely related to the investigational product.