The principle of Vaccination and Immunization | vedclass

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(A) The principle of Vaccination and Immunization is based on the property of 'memory' of the immune system.In vaccination,a preparation of antigenic

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Memory

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(A) The principle of Vaccination and Immunization is based on the property of 'memory' of the immune system.In vaccination,a preparation of antigenic proteins of pathogens or inactivated/weakened pathogens (vaccine) is introduced into the body.The antibodies produced in the body against these antigens neutralize the pathogenic agents during an actual infection.The vaccine also generates memory $B$ and $T$ cells that recognize the pathogen quickly upon subsequent exposure and overwhelm the invaders with a massive production of antibodies.If a person is infected with deadly microbes for which a quick immune response is required,such as in tetanus,we need to inject preformed antibodies or antitoxins.In the case of a snake bite,the injection given to the patient contains preformed antibodies against the snake venom. This type of immunization is called passive immunization.

The principle of Vaccination and Immunization is based on which property of the immune system?

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