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The principles of preventing diseases are:

Preventing the spread of diseases like,

Air borne diseases:
- Stay away from the person having this disease.
- Always wear a mask.
- Must cover your mouth and nose.

Water borne diseases:
- Drink clean water.
- There should be the proper sewage system.

Vector borne diseases:
- Live in a clean environment.
- Proper nutrition should be available.
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