1985. 1985 A foreigner was admitted to Peking Union Medical College Hospital because of persistent high fever and dyspnea, and was tested positive for HIV (human immunodeficiency virus, also known as HIV). This is the first HIV carrier found in China. AIDS is a very harmful infectious disease, which is caused by HIV infection. HIV is a virus that can attack the human immune system. Taking CD4T lymphocytes, the most important cell in the human immune system, as the main target, it destroys a large number of cells and makes the human body lose its immune function. Therefore, the human body is prone to infection and malignant tumors, and the mortality rate is very high.