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Principle of vaccination is based on the property of memory of the immune system

 

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When we receive a vaccine, which is the small and harmless part of a germ, we do not fall sick.

This is because the components present in a vaccine help our immune system to learn what the germ looks like.

The immune system remembers it for any future encounter.

This special ability of the immune system to remember is called the immune response.

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Divya Sharma

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