1 What is cellular immunotherapy about? As you know, the body’s anti-tumor immunity is mainly cellular immunity, including T lymphocytes and NK cells. Generally speaking, cellular immunotherapy is to extract lymphocytes from the patient’s own (homozygous) or healthy (heterozygous) peripheral blood, culture them in vitro with interleukin (some of them will be further activated with antigen), and then infuse them back into the body after activation so as to play an anti-tumor role. It can be likened to taking out some soldiers for training and then sending them to the battlefield. 2 Indications for cellular immunotherapy mainly include tumors with strong immunogenicity such as melanoma, kidney cancer, low grade malignant lymphoma, hairy cell leukemia, bladder cancer and other tumors. 3 What is the efficacy? Even for the above indications, the objective efficacy does not exceed 15%. 4 What is the efficacy for solid tumors such as gastric cancer, colon cancer, breast cancer, esophageal cancer, lung cancer, etc.? For solid tumors, cellular immunotherapy cannot replace surgery, chemotherapy, radiotherapy and targeted therapy as the primary treatment. It can only be used as adjuvant therapy because of its low objective efficiency.