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Immunity

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by

Harvey Buckle

on 23 November 2017

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Transcript of Immunity

Immunity
Aim
To know how immunity is given to individuals
Starter
What have you been IMMUNISED against...how did they do it?
immunity 1
Once inside the body, pathogens reproduce. Viruses reproduce inside cells and damage them, while escaping to infect more cells. Bacteria produce toxins - poisons. Cell damage and toxins cause the symptoms of infectious diseases.
Once pathogens enter the body, the immune system destroys them. White blood cells are important components of the immune system.
What is immunity?
Once you have been infected with a particular pathogen and produced antibodies against it, some of the white blood cells remain. If you become infected again with the same pathogen, these white blood cells reproduce very rapidly and the pathogen is destroyed. This is active immunity. Sometimes you may be treated for infection by an injection of certain antibodies from someone else. This is passive immunity.
Playing doctor
Next...some questions!!
Play doctor!
Full transcript