Generally, HIV antigens and antibodies can be detected in an infected person in about 2-3 weeks after a 4-generation HIV test. Therefore, if no HIV antigen or antibodies are detected after 3 weeks of 4-generation testing, and if special circumstances of the infected person are excluded, HIV infection can be ruled out. These special cases are when the infected person is not treated with immunosuppressive drugs that affect antibody production and antigen response, including hormones and monoclonal antibodies. The majority of patients can be detected within 2-3 weeks of infection if they do not have a significant disease or immune deficiency. If you are not sure about the test results or if you are afraid of HIV, you can get further clarification through HIV-RNA testing.