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The appropriate order of test positivity with different types of laboratory tests following infection with hiv are HIV RNA comes after the HIV p24 antigen, then HIV antibody.
Even though HIV tests are very accurate, the virus cannot be found right away after infection. The sort of test performed will determine how quickly HIV can be detected. The three HIV testing methods are antibody, antigen/antibody, and nucleic acid assays (NAT). Antibody tests look for HIV antibodies in a person's blood or oral fluid. After exposure, it may take 23 to 90 days for an antibody test to show HIV. Antibody tests, which are also the quickest available tests, are the only HIV self-tests authorized by the FDA. HIV is often more difficult to detect using tests that require blood from a vein than it is with tests that use oral fluid or blood from a fingerstick. Antigen/antibody testing can identify both HIV antibodies and antigens. A person's immune system creates antibodies in response to viral exposure, such as HIV. An individual's immune system is triggered by foreign chemicals known as antigens.
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