a desert in NW India and S Pakistan. About 77,000 sq. mi. (200,000 sq. km). Also called Great Indian Desert.
HIV tests are used to detect the presence of the human immunodeficiency virus (HIV), the virus that causes acquired immunodeficiency syndrome (AIDS), in serum, saliva, or urine. Such tests may detect antibodies, antigens, or RNA.
The most common HIV test is the antibody screening test (immunoassay), which tests for the antibodies that your body makes against HIV. The immunoassay may be conducted in a lab or as a rapid test at the testing site.hese tests can find recent infection earlier than tests that detect only antibodies. These antigen/antibody combination tests can find HIV as soon as 3 weeks after exposure to the virus, but they are only available for testing blood, not oral fluid.