Active immunity against a particular disease can be acquired only by actually having the disease. This statement is False.
- Either natural immunity or vaccine-induced immunity can be used to build up active immunity. Natural immunity is built up through exposure to the disease-causing agent and subsequent disease-related illness.
- Hence it is not necessary that active immunity is always acquired only by actually having the disease.
- The adaptive immune system is activated when the body is exposed to a new disease pathogen through a series of signaling molecules and innate immune system response.
- Large-scale T cell and B cell production that is specific to the pathogen is encouraged. Some T cell subsets actively destroy the pathogen, while others encourage the formation of B cells.
- White blood cells called B cells create antibodies that help in eradicating or neutralizing.
- Active immunity includes things like a person's resistance to strep throat from a prior infection or their immunity to polio from receiving the polio vaccination.
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