Because your government is not in many cases. In fact, depending on where you live, to call what passes for disaster preparedness as preparedness is on par with calling prostitution virginity.
Here is a report (and more) on global health security that you really should read, or at least skim. While the US rates high, my own opinion is that there is still room for improvement on this topic and on many others.
As before, here is a page at Johns Hopkins that includes a very good interactive graphic that allows you to display current data on 2019-nCoV.
More soon.