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.
These blood tests check for HIV antibodies. Your body makes antibodies in response to the HIV infection. These tests can't detect HIV in the blood soon after infection because it takes time for your body to make these antibodies.