Something is off there. Look at the compact territory of Central East Europe that fared significantly better, the most interesting thing being the difference between the west and the east of Germany in the Gulzhan's link. Below in the comments there are some German people that confirmed the data.I don't think so. How is the Portuguese inmune system different from Spaniards'? Greeks' from Italians'? The reason for disparities is the different crisis management, that's all. Those who took the appropriate measures in due time fared better.