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 HIV antibody test. Once a person becomes infected with HIV, a number of steps must take place before an HIV antibody test can detect infection. First, the virus infects more and more cells in the personâs body.