In recent years, immunotherapy has developed rapidly and is widely used in the treatment of various hematological malignancies; various immunotherapy drugs, including PD-1 inhibitors, have also demonstrated their safety and efficacy in CAEBV, while immune cell therapies such as Epstein- Barr virus-specific T cells have also displayed their unique advantages in CAEBV. The gene discussed is PDCD1; the disease is hematologic disorder.