Perhaps you are thinking of the common cold ("man-flu")Who cares... its flu, you get it, get better, and laugh about it.
real influenza is much more serious. depending on the strain, and your health, you might get better, or you might die. This pig flu appears to be one of the more serious strains, so depending on your general health, breathing difficulties, and care you receive, the odds of dying appear to be higher than usual. They might not be so much higher that civilisation collapses, but may be high enough to finish off some of the old or the sick.