One that everyone is concerned about (but the North Koreans won’t admit it) is the infection rate in that country. Remember, both Chinese business people and tourists travel to North Korea a lot, and there is a chance that North Koreans, already ravaged by a famished diet, could be extremely vulnerable to this disease.
I haven’t seen any credible claims of NK cases. I did see a claim around 2 or 3 weeks ago, but it was not substantiated, I believe.
If you hear of substantiated claims in NK, feel free to post.
I do know NK has been very actively moving to not allow the disease into the country, but do not know whether they have been successful.