Are you talking about travelers from China in general or regards to this virus? Haha.
Anyway, this new virus hasn't yet proven itself to be enough of a threat to warrant shutting everything down. The world is swarming with countless diseases whose transmission are aided by travel. Until such a time that the outbreak proves truly disastrous, shutting down travel does more harm than good.
Granted extreme measures might cut off the next HIV before it can spread out of control, but more likely the disease could be a nothingburger in the end.
This virus is interesting because it's new and coming out of the cesspit that is China, but I'm not that concerned. If anything I expect fears to be overhyped to distract from the Dem's impeachment plans falling apart.