What is the difference between infectious diseases and non infectious diseases?

Prevent/avoid them.: There are many differences in these broad topics, but one of the largest ones to me is that you can prevent/avoid infectious diseases, whereas it is a great deal more difficult to avoid non-infectious ones. Heart disease, for example, happens in many people no matter what they do to prevent it. Std's can be avoided, and treated, especially if they're caught in time.

See below: An infectious disease is caused by microorganisms such as viruses, bacteria, fungi, protozoa and parasites. Infectious diseases can affect almost every organ in the body. Examples are boils, abscesses, influenza, colds, pneumonia, pyelonephritis, amoebic dysentery, hiv/aids, malaria, tuberculosis, histoplasmosis etc. Etc. All other diseases would be non-infectious diseases.