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What is the basic principle of immunisation and vaccination?(a) It is based on the number of B and T lymphocytes(b) It is based on the property of memory of the immune system(c) It is based on antigen-antibody interactions(d) It is based upon the number of white blood cellsI have been asked this question in an interview for internship.This intriguing question originated from Human Health and Disease in section Human Health and Disease of Biology – Class 12

Answer»

The correct ANSWER is (B) It is based on the property of memory of the immune system

For explanation: The basic principle of immunisation or vaccination is based on the property of memory of the immune system. When an immunised person is ATTACKED by the PATHOGEN, the existing bodies immediately attack the antigen while the memory T and B cells give rise to a massive crop of lymphocytes and antibodies.



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