They know that out of 50 million that they are aware have it - 130 have died. Most recover from flu like symptoms in days.That is not a pandemic. They are sowing confusion in order to justify large scale military exercises.I remember the ebola scare and how the first pictures showed medical staff with very little protection. Eventually as they lost staff as well as patients they upped their game for protection, including closing some borders. It did help.
I think part of the response is that not much is known about this coronavirus virus.