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active immunity

noun, Immunology
immunity in an organism resulting from its own production of antibody or lymphocytes.
Compare passive immunity.
1910-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for active immunity
  • active immunity is usually long-lasting immunity produced by the immune system in response to antigens.
  • The children remain healthy, have normally active immunity to infection and must be considered cured.
  • active immunity can be acquired in two ways, either by contracting the disease or through vaccination.
active immunity in Medicine

active immunity n.
Immunity resulting from the development of antibodies in response to the presence of an antigen, as from vaccination or exposure to an infectious disease.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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active immunity in Science
active immunity  
See under acquired immunity.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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