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| Introduction |
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| Health is considered to be the state of perfect functioning of body and mind, unhindered by diseases. Disease is the malfunctioning of the organism or a part of it due to infection, inherent weakness or environmental stress that upsets the normal physiological functioning of the organism. |
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| Diseases are of Two Types: |
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 Communicable diseases (Infectious) |
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 Non-communicable diseases (Non-infectious) |
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