Original: A pandemic ( from Greek Ï á 3\/4 Î 1\/2 pan '' all '' + Î á Î 1\/4 Î Ï demos '' people '' ) is an epidemic of infectious disease that is spreading through human populations across a large region ; for instance multiple continent , or even worldwide .
Simplified: A pandemic ( from Greek Ï Î Î 1\/2 pan all + Î Î Î 1\/4 Î Ï demos people ) is an epidemic ( an outbreak of an infectious disease ) that spreads across a large region ( for example a continent ) , or even worldwide .