<s>[INST] What is an HIV test? [/INST] An HIV test is a test that reveals whether a person has been infected with HIV. Commonly used HIV tests detect the antibodies produced by the immune system in response to HIV, as they are much easier (and cheaper) to detect than the virus itself. Antibodies are produced by the immune system in response to an infection.

For most people, it takes a month for these antibodies to develop. Antibodies can be found in blood or oral fluid. Source: UNAIDS. Link: https://www.unaids.org/en/frequently-asked-questions-about-hiv-and-aids. Field: Infectious Disease. Disease: HIV </s>