To evaluate the efficacy and safety of iNK cells infusion in patients with chronic active Epstein-Barr virus infection (CAEBV) and EBV-associated hemophagocytic lymphohistiocytosis (EBV-HLH) after allogeneic hematopoietic stem cell transplantation (allo-HSCT)

It is a prospective, open-lable study to evaluate the efficacy and safety of iNK cell infusion in CAEBV/EBV-HLH patients after allo-HSCT. The study will enroll fifteen subjects who will receive ongoing least 4 doses of iNK cells intravenously infusion after allogeneic hematopoietic stem cell transplantation. All subjects will assess the incidence of disease relapse and EBV-DNA reactivation up to one year.

Inclusion Criteria:

1. Patients with CAEBV or EBV-HLH who are eligible for allogeneic hematopoietic stem cell transplantation meet one of the following criteria:

   ①EBV-DNA (PBMC or plasma) was still more than 103 before transplantation；②Positive for Cerebrospinal fluid EBV-DNA；

   ③Abnormal phenotypic lymphocytes could still be detected in bone marrow immunotyping；

   ④Measurable EBV-related lesions on imaging；

2. ≤65 years，ECOG :0-2；

3. Cardiac EF≥40%, creatinine clearance ≥50%; aminotransferase（ALT/AST）<200U/L。；

4. In patients with HLH, HLH efficacy ≥Partial Response after prior treatment is required；

5. Estimated survival time is longer than three months；

6. Agree to sign the Informed Consent Form。

Exclusion Criteria:

1. Patients with evidence of grade II or more serious heart disease according to the New York Heart Association (NYHA) score (including Grade II) ; Clear diagnosis of cirrhosis；
2. Active infections other than EBV that have not yet been controlled；
3. Positive for hepatitis B virus or hepatitis C virus；
4. Active massive hemorrhage of internal organs (including gastrointestinal hemorrhage, alveolar hemorrhage, intracranial hemorrhage, etc.)；
5. Also participation in other interventional clinical studies within 4 weeks