单词	active immunity
释义	active immunity noun : usually long-lasting immunity that is acquired through production of antibodies within the organism in response to the presence of antigens compare passive immunity Example Sentences Recent Examples on the Web In active immunity, antibodies are generated through exposure to a pathogen or a vaccine. Los Angeles Times, 3 Dec. 2020 While active immunity occurs when an individual produces antibodies to a disease through his or her own immune system, passive immunity is provided when a person is given antibodies. Leah Groth, Health.com, 15 Apr. 2020 But passive immunity doesn't last as long as active immunity, and loses effectiveness within a few weeks or months, per the CDC. Leah Groth, Health.com, 15 Apr. 2020 Word History First Known Use 1895, in the meaning defined above Medical Definition active immunity noun : usually long-lasting immunity that is acquired through production of antibodies within the organism in response to the presence of antigens compare acquired immunity, innate immunity, passive immunity
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