Its actually the same. Pan in Latin means all.  Pandemic may be attributed for larger areas, usually crossing internation boundaries.  So a larger epidemic becomes a pandemic.\n\n"Pandemic - an epidemic occurring over a very wide area, crossing international boundaries and usually affecting a large number of people. A global epidemic."\n\n"Epidemic - any unusual occurrence of disease, generally first noticed by an unexpected number of cases occurring over a particular amount of time or in a particular place. An outbreak of disease or injury in a defined geographic area over a specific amount of time."
what is the difference between an empidemic and a "pandemic"?