Question

what is immunisation in short line
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Answer 1

the process whereby people are protected against illness caused by infection with micro-organisms (formally called pathogens)....

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Answer 2

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• A process by which a person becomes protected against a disease through vaccination. This term is often used interchangeably with vaccination or inoculation

Four diseases which can be prevented by immunisation are :

$\longrightarrow$ Cowpox

$\longrightarrow$ Common cold

$\longrightarrow$ Smallpox

$\longrightarrow$ Measles

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