Question

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What are the basis of the principle of immunization?
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Please answer......
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Answer 1

Answer:

The basic principle of immunization is that on administration of vaccine, the body starts developing antibodies against it such that person is protected form disease. Body remembers the infectious agents and memory cells are formed which can immediately produce antibodies on further exposure to the infectious agents.

Answer 2

Vaccination provides memory to the immune system of the body against particular pathogen. Vaccine is an antigenic protein, inactivated or weakened live pathogen. On introduction of the body it produces antibodies and memory B cells and memory T cells. Whenever, the pathogen attacks a vaccinated person, the memory cells induce production of lymphocytes and antibodies that overwhelm and destroy the same. Hepatitis B vaccine is produced in yeast.