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.
HIV can be tested by blood testing. If there is a concern of a recent transmission of HIV, then your physician may choose to order a test checking for the presence of the proteins that make up the virus itself.