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Class 9ScienceWHY DO WE FALL ILL?Mix Example - WHY DO WE FALL ILL?
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$(a)$ What is immunisation?
$(b)$ Categorise the following into acute,chronic,infectious,or non-infectious diseases: Typhoid,$TB$,Goitre,Elephantiasis.

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(N/A) Immunisation is the process by which an individual's immune system becomes fortified against an infectious agent through artificial means,such as vaccination.
$(b)$ The classification of the given diseases is as follows:
- Typhoid: Infectious and Acute.
- $TB$ (Tuberculosis): Infectious and Chronic.
- Goitre: Non-infectious and Chronic.
- Elephantiasis: Infectious and Chronic.
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WHY DO WE FALL ILL?

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Mix Example - WHY DO WE FALL ILL?

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