People just don't know that you can have colon cancer and be completely asymptomatic and healthy.
Everybody has a colon. Everyone over 50 needs to get their colon checked.
There is no firm dividing line between what is an epidemic and what is not an epidemic, but I think, when you look at a map that shows widespread influenza activity in 36 states, that we regard it -- from a common-sense perspective -- as an epidemic.
If we do the kind of common-sense public health measures we know work, we ought to be able to stop it from being a global pandemic.