The principle of vaccination is based on which property of the immune system?
Show Hint
Immune memory is the cornerstone of vaccine efficacy.
- Plasticity
- Specificity
- Diversity
- Memory
The Correct Option is D
Approach Solution - 1
The principle of vaccination is based on the immune system's property of Memory.
(A) Memory - Correct: Vaccines stimulate immunological memory via memory B-cells and T-cells.
(B) Specificity - Incorrect: While important, this isn't the basis of vaccination.
(C) Diversity - Incorrect: Refers to antigen receptor variety, not vaccine mechanism.
(D) Plasticity - Incorrect: Describes immune adaptability, not vaccine function.
The correct answer is (D) Memory, enabling rapid response upon pathogen re-exposure.
Approach Solution -2
The principle of vaccination is based on the immune system’s ability to remember previous encounters with pathogens. When a person is vaccinated, they are exposed to a harmless form of a pathogen (e.g., killed bacteria or attenuated viruses). This triggers the immune system to produce antibodies and memory cells.
These memory cells allow the immune system to mount a rapid and effective response if the body encounters the real pathogen in the future.
Option (A) is correct because vaccination relies on the immune system's memory.
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