Controlling the Spread of Disease (Cambridge International IGCSE Science)
Exam board Cambridge International · IGCSEUpdated 2026-07-02
Controlling the Spread of Disease
- The simplest way to prevent disease is to stop pathogens from spreading
- This means using simple measures such as good hygiene and effective sanitation and waste disposal to contain pathogens and dispose of them safely
| Measure to prevent the spread | Importance |
|---|---|
| Clean water supply | Safe drinking water ensures water is free of pathogens which will prevent waterborne diseases e.g. cholera. |
| Hygienic food preparation | Washing hands with soap, correct food cooking methods and hygienic preparation of food will help to prevent contamination of food with harmful bacteria and fungi, |
| Personal hygiene | Washing with soap or using tissues to catch sneezes and coughs and then disposing of them will reduce transmission of diseases such as colds and flu. |
| Waste disposal | Proper disposal of waste e.g. food waste will reduce the prevalence of pests e.g. flies that can act as vectors for transmissible diseases. |
| Sewage treatment | Treatment of sewage removes harmful pathogens from waste before it is released into the environment. This reduces the risk of diseases spreading in contaminated water. |
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