Mind map on lesson why do we fall ill
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This lesson, 'Why do we fall ill' speaks about various kinds of diseases human encounters in their lifetime.
- Infectious diseases can spread through various ways such as:
- Air: The infectious diseases that spread through the air are called air-borne diseases. The air carries bacteria, viruses, etc. that causes diseases. eg: Common cold, Influenza, etc.
- Water and food: Contamination of food and water will contain million of pathogenic microorganisms causing severe diseases. eg: Cholera, Typhoid,etc.
- Contact: Disease spread from an infected person. eg: fungal infections, Covid-19,etc.
- Vectors: Pathogenic microorganisms use vectors like mosquitoes, houseflies, etc., to spread the diseases. eg: Malaria
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