HIV viruses. Coloured Transmission Electron Micro- graph (TEM) of a section through the cell membrane of a T-lymphocyte white blood cell (T-cell) show- ing budding Human Immunodeficiency Viruses (HIV). HIV is the virus that causes AIDS (Acquired Immune Deficiency Syndrome). Along with the budding viruses, other viruses (green) are being produced within the T-cell (in lower frame). HIV causes AIDS by infecting T-cells, that play a vital role in the body's immune system. Like other viruses, HIV reproduces by turning the infected cell into a virus-producing machine. The lack of healthy T- cells means the victim is helpless against infection. Magnification unknown.
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