Q18 of 70 Page 57

What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B Vaccine is produced.

1. Vaccination is the process of injecting weak or inactive pathogen of a specific disease in the body of an individual.


2. This makes the body generate an immune response by releasing antibodies with memory B and T cells.


3. So, when a vaccinated person is attacked by the same pathogen again, naturally the body remembers and recognise the antigen and release the same antibodies and lymphocytes against it.


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