Communicable diseases are those diseases that are caused by pathogens and spread from one person to another person through any form of contact.  Non-infectious diseases are also known as non-communicable diseases and are generally caused by things like heredity, malnutrition, environment, and way of life. Non-infectious diseases cannot be transmitted from one person to another since they are not caused by microorganisms.One of the four main examples of non-communicable diseases is diabetes, cardiovascular disease, cancer, and chronic respiratory diseases. Diabetes is a chronic disorder that develops when the body cannot properly use the insulin that it makes or does not create enough of it. Thus, diabetes is not a communicable disease, rather it is a non-communicable disease.