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Chapter- 13 WHY DO WE FALL ILL, PART-1 , By: Sandeep Tripathi

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Health is a state of complete physical, mental and social well-being., Basic conditions for good health:, Proper balanced and nutritious diet., Personal hygiene., Clean environment and surroundings., Healthy air, no pollution in the surrounding., Regular exercise., Proper rest., Good standard of living and economic status.

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Disease: when the body is not at comfortable then it is said to have a disease.When there is a disease, the functioning or appearance of one or more systems of the body changes.Depending on the duration—disease is classified as acute or chronic., Acute disease: Diseases that last for only short period of time, e.g., headache, common cold etc., Chronic disease: Diseases that last for long time,’ are called chronic diseases, e.g., elephantiasis, tuberculosis, etc.

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Causes of diseases:, (a) Infectious causes: Diseases where microbes are the immediate causes are called infections diseases. The infection spreads from one person to another., (b) Non-infectious causes: Some diseases that do not spread in the community, but remains internal are called non-infectious diseases. Example, cancer, genetic abnormalities, high blood pressure etc.