The timing of HIV testing is generally accurate as long as the window period is avoided. The window period varies from test to test. For simple HIV antibody testing, HIV antibodies can be detected in the blood of the infected person about 3-4 weeks after HIV infection. In the case of HIV antigen and antibody combination test, it can be detected in the patient’s blood about 2-3 weeks after HIV infection. In the case of HIV-RNA, HIV can be detected in the blood about 7-10 days after HIV infection. Therefore, if you have high-risk behavior and suspect that you may be infected with HIV, you should get tested about 4 weeks after the high-risk behavior for more accurate results.