Definition:
The words pandemic and epidemic are easily confused, so here is some clarification.
An epidemic refers to a contagious, infectious or viral illness that spreads to many people in one geographic region that occurs in excess of the numbers of cases that would usually be expected.
A pandemic refers to a contagious, infectious or viral illness that spreads, and may include millions of people in many areas across the globe, according to the World Health Organization's description.
