Vaccines and their role · NCERT Biology

What is the primary objective of 'Active Immunization'?

  1. To provide immediate but short-lived protection through externally supplied antibodies
  2. To stimulate the immune system to produce its own antibodies and memory cells
  3. To treat a patient already suffering from an established chronic infectious disease
  4. To suppress immune activity during organ transplantation and prevent rejection
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Correct answer: To stimulate the immune system to produce its own antibodies and memory cells

Active immunization involves introducing an antigen into the body to stimulate the natural immune response. This leads to the production of specific antibodies and the formation of memory B and T cells, conferring long-term protection against future infections.

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