It is impossible to determine the exact time for immunotherapy. Immunotherapy is a therapeutic method to enhance or inhibit the body’s immune function artificially to achieve the purpose of treating the disease in response to the body’s low or high immune status. There are many methods of immunotherapy, which can be categorized into molecular therapy, cellular therapy and immunomodulator therapy according to the agents used in the treatment. Immunotherapy often varies depending on the area where the drug is used, the disease, and the type of drug, so it is impossible to have a clear and specific time for each treatment. 1. Molecular therapy: refers to the input of molecular agents into the body in order to regulate the specific immune response of the body. For example, monoclonal antibody, mainly lymph node injection, subcutaneous multi-point injection, multi-way joint injection method, etc., all the treatment time is generally not a definite time. 2. Cell therapy: It refers to the input of cell preparations into the body in order to activate or enhance the specific immune response of the body. For example, in the case of over-immune cell therapy, autologous lymphocytes are taken, activated and proliferated in vitro, and then infused back to the patient to produce anti-tumor immune effects. Generally, after the first blood collection, we need to wait for 14 days to infuse the processed immune cells for the first treatment. 3. Immunomodulator therapy: including biological response regulation and immunosuppressants can inhibit the body’s immune function, commonly used in the treatment of autoimmune diseases and prevent the occurrence of transplant rejection. The above medicines are for reference only, and the specific dosage should follow the doctor’s instructions. When the immune abnormality, it is recommended to consult a doctor in time, with the help of the doctor for targeted treatment or therapy.