• An antibody is a protein produced by the body’s immune system when it detects harmful substances, called antigens. Examples of antigens include microorganisms (bacteria, fungi, parasites, and viruses) and chemicals.
  • Antibodies may be produced when the immune system mistakenly considers healthy tissue a harmful substance. This is called an autoimmune disorder.
  • Each type of antibody is unique and defends the body against one specific type of antigen.


Source: NLM_NIH, 27 OCT 2014, www.nlm.nih.gov/medlineplus/ency/article/002223.htm

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