What is vaccination?

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(A) Vaccination is the process of introducing a vaccine into the body to stimulate the immune system.It involves the administration of antigenic prote

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Active immunity

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(A) Vaccination is the process of introducing a vaccine into the body to stimulate the immune system.It involves the administration of antigenic proteins of pathogens or inactivated/weakened pathogens (vaccine) into the body.The immune system recognizes these antigens and produces antibodies against them.This process generates memory $B$-cells and $T$-cells that recognize the pathogen on subsequent exposure and produce a massive immune response.Since the body's own immune system is actively involved in producing antibodies and memory cells,vaccination is a form of active immunity.

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