Clinical Study of Therapeutic Immunological Agent for EBV Lymphoproliferative Diseases

"27 participants with will be enrolled in the study and divided into three groups, including EBV-LPD (Adults group), EBV-LPD (Children group) and PTLD (Adults group） each with 9 people.The participants will be divided into three different dose groups, and a 3+3 dose escalation design is used. The low dose is 5.0×10\^5, the medium dose is 2.0×10\^6 and the high dose is 5.0×10\^6 for children and low dose is 5.0×10\^6, the medium dose is 2.0×10\^7 and the high dose is 5.0×10\^7 for adults. Only one dose will be administered to each participant with EBV immunological agent combined with Toripalimab 240mg."