The reports from China now indicate that the patients who have caught the virus are infectious to others within as little as a day, whereas symptoms such as fever do not develop for at least several days to a week.
That very much calls into question the effectiveness of the airport screening as currently implemented. Imho, it seems likely that the few early international cases will soon have considerable company.
Unless there is a cure found fairly soon, we should expect much harsher travel restrictions.
.