An outbreak is unforeseen of a disease in a specific area in more significant numbers than it typically occurs. The outbreak could be confined in a small area, but it may also appear in a broader region. An example of an epidemic is the E Coli infection.
However, the outbreaks are more localized, whereas an epidemic is widespread. An epidemic has a higher number of cases of a particular disease in a specific area. It usually has a considerable impact on a more significant population, as opposed to an outbreak, and the epidemic process is characterized by a perpetual transmission of the virus or sickness among individuals.
There are three factors needed to create an epidemic. These include a source of the infectious process, the spread of the illness, and susceptible disease individuals.