Mar 19, 2014 · This feature is not available right now. Please try again later. Sep 08, 2014 · In that circumstance, it is useful to draw several epidemic curves, using different units on the x-axes, to find one that seems to show the data best. Finally, show the pre- and post-epidemic period on your graph to illustrate the activity of the disease during those periods.

Epidemic vs. Pandemic vs. Endemic By Maeve Maddox The dreadful outbreak of the Ebola virus in West Africa has made headlines like these a daily sight in newspapers and on news sites all over the world: The graph to the right is an epidemic curve for the first outbreak of Legionnaires' disease in 1976 in Philadelphia.An epidemic curve provides a great deal of information. If you know what disease you are dealing with and you know its incubation period, the pattern of disease occurrence over time can narrow down the source of infection.