Nowadays, medicine is very advanced, but there are still some diseases that humans cannot be cured, such as AIDS, which is an autoimmune deficiency disease that can cause a person’s immunity to decline, and people will die from multiple infections. Scientists are currently developing new treatments, and most cancers cannot be cured. Early detection of cancer is very effective, but most cancers are found late and are extremely ineffective. Leukemia, also known as blood cancer, is also a type of malignant tumor. Acute malignant leukemia has poor results even after applying radiation, chemotherapy, bone marrow transplantation and other methods. Rheumatoid patients can be controlled with drugs for a long time, but they cannot recover completely. In addition, once rabies is difficult to treat, people will die quickly in a short period of time.