Greenland is the worst to try to infect. If you don't infect it before Russia, Sweden, and Norway close the seaports its pretty much Gameover for anything except fungus, because if you save enough points at the end you can actually devolve then evolve the spore burst that can save you if you have everyone but greenland infected.
Starting in greenland is pretty bad too. It only has about 50k people and accessible only by seaport it can take forever to infect those 50k and then will only spread to three countries from its start location, it is not advisable to run the nanovirus or bioweapon here.
And In real life, greenland has the many airports and seaports.
Think the game map is from around 1901.