Early next week to stop flights is about a half a week too late.
North Korea doing it now
SEOUL, Jan. 25 (Yonhap) — North Korea on Saturday stepped up efforts to prevent the spread of a new strain of the Chinese coronavirus with the cancellation of a flight between Pyongyang and Beijing, and a temporary restriction on foreign residents’ trips to China.
I would state the obvious, that being much of the people in N. Korea are already malnourished, ill. Even many of the military. Such folks stand little hope of survival...