Endemic and Epidemic :



“Endemic” is in danger of losing its core meaning through confusion with “epidemic.” An endemic condition is one characteristic of a particular region, population, or environment:


“sore thumbs are endemic among teen text-messagers.”


A condition need not affect a majority or even a very large number of people in a population to be endemic. In biology, an endemic disease is one that is maintained locally without the need for outside influence:


“Cholera is endemic in Kolkata.”


It keeps recurring there, but still only a small minority of the population gets cholera.


An epidemic condition is widespread, rampant:


“Overindulgence in fatty foods in epidemic throughout the world.”


The dominance of the noun “epidemic” (“the threat of a flu epidemic”) may make people reluctant to use it as an adjective (“flu may become epidemic”) but both uses are legitimate.


It’s best to stick with “epidemic” unless you have a specific need for the technical term “endemic.”