AIDS drug. Researcher holding a bottle of the AIDS drug T-20 (enfuvirtide, or Fuzeon). This is a type of drug known as a fusion (or entry) inhibitor, as it prevents the virus from entering its host cell. AIDS (acquired immune deficiency syndrome) is a disease caused by HIV (human immunodeficiency virus). HIV attacks T-4 lymphocyte white blood cells, which form an important part of the human immune system. It invades these cells and forces them to make more HIV, which ultimately destroys the T-4 cells. T-20 is a peptide (protein) drug that works by binding to HIV. It is being developed by Trimeris and Hoffmann-La Roche.
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