Vaccination, in which a weakened or killed pathogen is introduced to provoke immunity, is an example of
- A. artificially active immunity
- B. artificially passive immunity
- C. naturally passive immunity
- D. innate immunity
Explanation
The body actively responds and makes memory, but the exposure is deliberate and medical rather than natural infection. All four immunity types differ only in whether exposure is natural or artificial and whether the body or a donor supplies the response.