If the HIV test is done one year after the high risk period, the result is very accurate because the window period of HIV is usually around four weeks. If the test is done one year after the high risk period, the window period has already passed and HIV antigen, antibody and HIV RNA can be detected in the patient’s body at this time, as long as these tests are positive, the patient can be diagnosed with HIV infection. Once HIV infection is diagnosed, the patient should be treated with antiviral drugs as soon as possible because most patients are still in the incubation period one year after HIV infection, and most of them may not have any symptoms. life expectancy close to that of a normal person.