What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B Vaccine is produced.
The principle of vaccination is based on the property of immune system of memory cells.
In vaccination, a preparation of antigenic proteins or inactivated or live occurs but weakened pathogens are introduced into the body. The antigens generate or produces the primary immune response by producing antibodies along with memory B- cells and T- cells.
When the vaccinated person is attacked by the same pathogens again, the existing memory B- cells and T- cells recognize that antigen and overwhelm the invaders with massive production of lymphocytes and antibodies.
Hepatitis B vaccine is produced from yeast.
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