active immunity

noun

, Immunology.

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

active immunity

1. See under acquired immunity

Word History and Origins

Origin of active immunity¹

First recorded in 1910–15

Example Sentences

For some viruses and vaccines, active immunity can last decades — even the rest of your life.

From Science News For Students

Active immunity has thus been shown to be associated with the presence of certain anti-substances in the serum.

From Project Gutenberg

The increased ingestion of bacteria in active immunity would seem to depend upon the presence of immune opsonins in the serum.

From Project Gutenberg

In producing active immunity against many bacterial diseases the organisms are introduced (c) dead.

From Project Gutenberg

An active immunity is thus induced in susceptible animals which lasts until the danger from exposure to the disease is over.

From Project Gutenberg