Testing for HIV is usually recommended after 4 weeks following a high-risk behavior with a person with HIV. Because the current window period is about 4 weeks, if the test is performed during the window period, it may give false-negative results and will not be able to detect whether there is an infection, while the results of the test performed after 4 weeks are often more accurate. At present, the majority of hospitals in China test for AIDS antibodies, which can usually be detected about 3-4 weeks after infection. So if you go for the test after 4 weeks, it will be relatively very accurate. Once the infection is detected, the patient should be treated with antiviral drugs as soon as possible.