What is Immunisation and why is it done????
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For certain infectious diseases like measles or mumps, once a person has had them and recovered they are almost certain never to catch that disease again. This is because when you get an infectious disease your body makes antibodies against that disease which means that if you are ever exposed to it again - your antibodies in your blood will kill off the bugs before they have any effect.
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The process by which an individual's immune system become fortified against the agents this is termed as immunisation it is done for prevention of infectious diseases
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