From the beginning of AIDS infection to the end stage of AIDS is a long and complicated process. At different stages of the disease, there are various symptoms associated with AIDS infection: 1. Acute AIDS infection period: usually more than ten days to several weeks, with an average of 3-6 weeks. Patients in this period may experience a series of symptoms similar to influenza and viral infection due to the invasion of the virus into their bodies, such as fever, night sweats, dizziness, nausea, vomiting, joint pain, rash, lymphadenopathy, sore throat, pharyngitis, diarrhea, depression and loss of appetite. Most of these symptoms last for a period of time and will improve on their own. 2. Asymptomatic period: The asymptomatic period of AIDS is similar to the incubation period of other viral diseases, during which the symptoms subside and last longer. It takes about 10 years from the asymptomatic viremia to the AIDS stage (the exact time varies from person to person), and during this period the patient does not develop any pathological symptoms due to the AIDS infection. Therefore, many AIDS patients do not realize that they are AIDS patients during the asymptomatic period. 3. AIDS stage: Patients will enter the end stage of AIDS after a long asymptomatic period, when the HIV virus has destroyed the patient’s immune system, resulting in a sharp decline in the patient’s physical condition and a high risk of infection with viruses, fungi, parasites and other diseases. Patients in the AIDS stage show fever, weight loss, swollen superficial lymph nodes all over the body, often combined with oral candidiasis, various pneumonia, cytomegalovirus infection, herpes virus infection, toxoplasma infection, cryptococcal meningitis and active tuberculosis, as well as Kaposi’s sarcoma, lymphoma and other tumor diseases. About half of the patients may develop central nervous system symptoms, such as mental incompetence, memory loss, epilepsy, and dementia.