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Definition of «Active immunity»

Active immunity

Active immunity: The production of antibodies against a specific agent by the immune system. Active immunity can be acquired in two ways:

  • by contracting an infectious disease -- such as, for example, chickenpox; or
  • by receiving a vaccination usually pe-- such as, for example, against polio.
Active immunity is permanent. The individual is protected from the disease all their life. See also: Passive immunity.

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