I'm not an epidemiologist or anything but even I know why it's spreading.
The combination of moron anti-vaccination liberals plus a flood of illegal, unvaccinated illegals and their kids is a lethal cocktail for the children of America.
We don't know the names of the victims yet, but these avoidable deaths are a tragedy-a Western tragedy of affluenza and an obnoxious longing for a pure, bucolic past that never was. Digsuting.