Vaccination meaning, Principle and types

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 What is Vaccination

  • Vaccination is the process of inoculation of harmful antigenic material into healthy person for providing active immunity against disease.
  • Vaccination is a term derived from latin word Vacca by Edward Jenner.
  •  Why Vaccination?
  • Weakened or dead portion of pathogen are injected into the person who is required to be immune. The pathogens in vaccine are unable to cause disease but sufficient to stimulate antigen production.
  • As a result the vaccinated person develop immunity without contacting with disease.
  • The use of Vaccines for disease treatment is said to be vaccinotherapy.


Principle of Vaccination

VACCINE: It is a suspension or extract of germs that are weakened and injected upon injected to normal body provides active aquired immunity.
Vaccines can be obtained by seperation of antigen from the infecting agent surface and then multiplying it with recombinant technology.
PRINCIPLE: It is based on the principle of memmory cells property and production of B cells and T Cells that recognise pathogen easily.
In India vaccines are produced at Hofkin's institute, Mumbai, NII New Delhi etc.
The main aim of vaccination is to provide immunity.



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