original_query: What are HIV tests used for?
query: What are HIV tests used for?
answer: HIV tests are used to detect the presence of the human immunodeficiency virus (HIV), the virus that causes AIDS, in blood, saliva, or urine.  They may detect antibodies, antigens, or RNA.  These tests are used for diagnosis of HIV infection in individuals, screening donor blood and cellular products, and monitoring the progression of HIV infection.