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 is most commonly diagnosed by testing your blood or saliva for antibodies to the virus. Unfortunately, it takes time for your body to develop these antibodies â usually up to 12 weeks.hese tests include: 1  CD4 count. 2  CD4 cells are a type of white blood cell that's specifically targeted and destroyed by HIV. 3  Even if you have no symptoms, HIV infection progresses to AIDS when your CD4 count dips below 200. 4  Viral load. 5  This test measures the amount of virus in your blood.