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.
A test for the human immunodeficiency virus (HIV) is done to: 1  Detect an HIV infection. 2  Screen blood, blood products, and organ donors to prevent the spread of HIV. 3  Screen pregnant women for HIV infection.  Find out if a baby born to an HIV-positive woman also is infected with HIV.