After the human body becomes infected with the HIV virus, 50%-70% of people may exhibit symptoms similar to the common cold, such as fever, headache, sore throat, and muscle and joint pain, about two weeks later. There can also be generalized swelling of the lymph nodes, the appearance of maculopapular rashes, and symptoms such as nausea, vomiting, and diarrhea. Generally, these symptoms will disappear after about a month, and then a symptom-free infection period follows, which can last from 1 to 10 years. Subsequently, the individual enters the AIDS phase. During the AIDS phase, various types of infections erupt, including bacterial, viral, fungal, and parasitic infections, and even concurrent malignant tumors, all of which can lead to death.