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lab-test

HIV test: Commonly-used HIV ELISA tests detect the antibodies produced by the immune system in response to HIV, as it is much easier (and cheaper) to detect antibodies than the virus itself. Antibodies are produced by the immune system in response to an infection (antigen). For most people, it takes 3 months for anti-HIV antibodies to develop. In rare cases, it can take up to 6 months. During this period of early infection a person is at their most infectious.
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