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.
1 All HIV tests used in the U.S. detect HIV-1, and some tests have been developed that can also detect HIV-2. ( 2 HIV-1 is the most common type found in the United States, while HIV-2 has a higher prevalence in parts of Africa.).ifferent types of antibody tests may be used for HIV screening: 1  All HIV tests used in the U.S. detect HIV-1, and some tests have been developed that can also detect HIV-2.