CBSE Class 9 Answered
Expert Answer
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Acute Diseases |
Chronic Diseases |
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Acute diseases develop quickly and last for a short period of time. |
Chronic diseases last for a longer period of time, sometimes even for a lifetime. |
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Acute diseases do not cause long term adverse effects on our health |
Chronic diseases have drastic long term effects on our health. |
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Example: cold, cough, sore throat, influenza |
Example: cardio-vascular diseases, tuberculosis, diabetes |
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Infectious Disease |
Non-Infectious Disease |
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Caused due to attack of pathogens |
Caused by factors other than pathogens |
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Caused due to extrinsic factors |
Caused due to intrinsic factors |
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Transmitted from one person to another |
Do not get transmitted from one person to another |
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Transmission of diseases occurs through direct contact or some medium (air, water, vectors) |
Transmission in case of hereditary diseases is from parent to offspring |
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Community hygiene can reduce the occurrence of these diseases |
Community hygiene is ineffective in reducing the occurrence of these diseases |
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E.g. Cholera, Malaria |
E.g. Diabetes, Goitre |
Application Videos
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Factors Causing Diseases
This video discusses the factors causing diseases.
Concept Videos
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Diseases and Illness
Health and Diseases -
Diseases and Illness
Health and Diseases -
Diseases and Illness
Health and Diseases
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