This document discusses how diseases are spread, distinguishing between infectious and non-infectious diseases. It notes that infectious diseases can be caused by bacteria, viruses, protozoans, or fungi and are transmitted through personal contact, contact with contaminated objects, animals, water, or food. Non-infectious diseases like obesity or allergies are not transmitted between individuals.

2. Medical specialist General practitioner

3.  Infectious diseases: like flu, measles, chicken pox.
 Non - infectious diseases: like obesity or allergies.

4.  Bacteria: harmless to humans, like tetanus.
 Viruses: harmful to humans beings, like flu.
 Protozoans: caused infections, like cholera.
 Fungi: caused diseases in skin, Athlete’s foot.

5.  By personal contact.
 By contact of contaminated objects.
 By animal carries.
 By contaminated water.
 By contaminated food.