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HIV/AIDS Glossary

Western Blot

A type of antibody test used to confirm a positive result on an HIV screening test. (The initial screening test is usually a different type of antibody test or, less often, a viral load test). The immune system responds to HIV infection by producing HIV antibodies. A Western blot for confirmatory HIV testing is done using a blood sample.

Related Term(s): Antibody, Viral Load Test

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