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In general, antibody tests that use blood can detect HIV slightly sooner after infection than tests done with oral fluid. It can take 3 to 12 weeks (21-84 days) for an HIV-positive personâs body to make enough antibodies for an antibody test to detect HIV infection. This is called the window period.
How long does HIV test last? Actual testing, including Urine, and blood tests, can take about 25 minutes, and include some basic questions, however this is not too much of your concern. What gives you anxiety is waiting for the results. After the anonymous test, you usually must return to the testing site in one to two weeks.