I vaguely remember hearing about a certain genetic immunity to the Black Death - it was in conjunction with a documentary on someone who was found to be immune to HIV.
In addition, Poland was home to a lot of Jewish people, who do to Religious reasons were one of the cleanest people in Europe at the time, which kept the Black Plague at bay (since uncleanliness is one of the reasons the Black Plague spread so quickly and far).
Anyways, been lurking.
Would be completely happy with a friendly country taking over.
Would depend on the Allied country that isn't friendly. Someplace between 5-7.... occasionally a 3.
A negative country like North Korea, I'd find a gun and go out fighting.