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Related to active immunity: passive immunity, natural immunity, artificial passive immunity, artificial active immunity, artificial immunity
resistance resulting from previous exposure of an individual in question to an infectious agent or antigen; it may be active and specific, as a result of naturally acquired (apparent or inapparent) infection or intentional vaccination (artificial active immunity); or it may be passive, being acquired through transfer of antibodies from another person or from an animal, either naturally, as from mother to fetus, or by intentional inoculation (artificial passive immunity).
Farlex Partner Medical Dictionary © Farlex 2012
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® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Active ImmunityThe natural immune response to an antigen by infectious exposure or inoculation, resulting in the formation of specific antibodies and protection from subsequent infection by the same pathogen.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
ac·quired im·mu·ni·ty(ă-kwīrd' i-myū'ni-tē)
Resistance resulting from previous exposure of the individual in question to an infectious agent or antigen; it may be active, as a result of naturally acquired infection or vaccination; or passive, being acquired from transfer of antibodies from another person or from an animal, either from mother to fetus or by inoculation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
active immunityImmunity to disease resulting from infection with the disease or immunization with a vaccine. In both cases there is active production of ANTIBODIES.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
active immunitysee ANTIBODY.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005