Active immunity

immunity in an organism resulting from its own production of antibody or lymphocytes.
Historical Examples

The increased ingestion of bacteria in active immunity would seem to depend upon the presence of immune opsonins in the serum.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 Various

An active immunity is thus induced in susceptible animals which lasts until the danger from exposure to the disease is over.
Special Report on Diseases of Cattle U.S. Department of Agriculture

active immunity has thus been shown to be associated with the presence of certain anti-substances in the serum.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 Various

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.
active immunity
See under acquired immunity.

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