Principles of treatment for diseases are:

(1) To reduce the effect of the diseases.

(2) To kill the cause of the disease i.e., to kill the microbes like bacteria, fungi, protozoa.

Principles of prevention are:

(a) General ways: It relate to preventing exposure to the microbes.

This can be done in following ways:

1. For avoiding air-borne infections-Avoid visiting public place, cover your nose and mouth while sneezing or coughing
2. For water-borne infection-Drink safe, clean and boiled water.
3. For vector-borne diseases-Keep the surroundings clean, keep food and water covered and clean. Do not allow any water to stand as it becomes a breeding ground for mosquitoes.
4. Self immunity- It is self-defence mechanism in our system that can fight off and kill microbes that enter our body.

(b) Specific ways: By giving vaccines, childhood immunisation that is given to children for preventing infections and diseases.