The difference between an epidemic and a pandemic. An epidemic is when an illness there is an outbreak of an illness in a certain area, usually an area that doesn't normally see that illness. But a pandemic is when you have clusters of epidemics globally and that we're seeing that with the swine flu now. There are few outbreaks in Europe, across the United States, Mexico. So it's a wide geographic area and possibly kind of go global. It doesn't everybody in the world gets it, but there are clusters of illness around the world, and that's what a pandemic is.