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Topic last updated: 09 Nov 2023

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    • Biology Biology
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    • 14-16
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Health, disease and the development of medicines

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Health and disease

Health and disease are interlinked but have different definitions.

Health refers to the state of physical and mental well-being whereas a disease is a cause of ill health. However, diseases are not the only factor that can cause ill health; diet, stress and lifestyle factors can also have an impact.

Diseases are further categorized into either communicable or non-communicable, depending on whether the disease involves a pathogen.

Communicable disease
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