Choose Simian Flu, pick the best you have unlocked for "Modify Genetic Code" and I would recommend you choose "Casual" difficulty for a easier time.
You must choose Greenland as your starting location. You also must make a colony in Greenland and have it stay in Greenland. Next all you have to do is beat the game. That's it.
You can move the colony inside of Greenland to evade the drone attacks. Like from southern Greenland to northern Greenland.