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.
Different types of tests may be used for HIV screening: 1  Combination HIV antibody and HIV antigen testâthis is the recommended screening test for HIV. 2  HIV antibody testingâall HIV antibody tests used in the U.S. detect HIV-1 and some tests have been developed that can also detect HIV-2.