TEK IMAGE / SCIENCE PHOTO LIBRARY TEK IMAGE / SCIENCE PHOTO LIBRARY
AIDS blood test. Technician holding a multi-well sample tray as he tests blood for HIV. HIV (human immunodeficiency virus) causes AIDS (acquired immune deficiency syndrome). The blood test checks for the presence of antibodies to this virus. AIDS is a fatal disease in which HIV invades and destroys white blood cells, leading to the failure of the immune system.
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