Question

what is immunisation

Answer 1

Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an agent
 
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Answer 2

☑️☑️✔️✔️If one person has chicken pox once, there is no chance of suffering from it again. This happens because when immune system for season infected microbe, it response against it and then remember it specifically .So the next time that particular microbe ,or its close relatives enter the body the ,immune system response with even greater vigour .This eliminates the infection even more quickly than the first time around .This is the basis of the principle of immunization.☑️☑️✔️✔️