Once it spreads to hundreds of thousands and tens of thousands die, it may be too late to prevent a general worldwide outbreak.
Another thing to look at: there appears to be about a 30:1 survival rate. That is to say, for every 30 people that have gotten the disease (based on the above numbers), 1 person will die. Think about an outbreak at a local school.
There hasn't been much reporting of this disease killing the very young. To the extent that the age of the dead has been reported, they seem to be mostly middle-aged and old.