Some diseases are transmitted through some sources like contaminated food, water, and air. The chronic disease like AIDS is transmitted through blood transfusions, sexual intercourse, by sharing injection needles, even from mother to child by breastfeeding. A disease can either be air-borne or water-borne or food-borne based on transmitting agents.
1. Air-borne diseases
2. Water-borne disease
3. Sexually-transmitted disease
4. Spread of disease through vectors.
Differences between symptoms and signs
|Symptoms indicate the presence of a disease.||Signs provide information about the presence of a particular disease.|
|They are a collective indication of a number of diseases in a particular part of organ.||
They are distinct for different disease.
Principle of Treatment
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