癌症免疫是指机体免疫系统对癌细胞的识别、攻击和清除能力。正常情况下，免疫系统能够识别并消灭异常细胞，防止癌症的发生。癌症免疫涉及免疫细胞如T淋巴细胞、B淋巴细胞和巨噬细胞等的活动，以及免疫调节分子的调控。免疫疗法是一种利用激发或增强患者自身免疫系统来对抗癌症的治疗方法。深入理解癌症免疫机制对于研发创新性治疗策略和提高癌症患者生存率至关重要。

Cancer immunity refers to the body's immune system's ability to recognize, attack and eliminate cancer cells. Under normal circumstances, the immune system is able to identify and destroy abnormal cells to prevent the occurrence of cancer. Cancer immunity involves the activities of immune cells such as T lymphocytes, B lymphocytes, and macrophages, as well as the regulation of immune regulatory molecules. Immunotherapy is a treatment that uses stimulating or boosting a patient's own immune system to fight cancer. A deep understanding of cancer immune mechanisms is crucial for developing innovative treatment strategies and improving survival rates of cancer patients.