In the last decade they've been more open with mainland China (even though the new anti-mainland government which rules since 2016 has soured these relations) and most of the tourism Taiwan receives is from mainlanders. Taiwan dodged the virus for two months because they banned the entrance of all mainlanders very early. Problem is the virus is not exclusively a mainland China thing anymore hence why their COVID cases are slowly rising now.
There are strong rumours the virus did arrived in NK and that the government quietly killed those who were infected. It's difficult to know anything precise from NK given their orwellian censorship machinery.
Philippines now has more than 1000 cases according to this article: https://www.thestar.com.my/news/regional/2020/03/29/virus-cases-in-philippines-exceed-1000-with-272-new-case-recorded