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 tests most commonly used in Canada look for antibodies to HIV in the blood. These tests cannot detect HIV infection in someone who has acute HIV infection because the body has not yet produced antibodies. The âwindow periodâ for antibody tests varies because some people produce antibodies faster than others.