In Nunavut's "igloo and email" society, where adults who were born in igloos have children who may never have been out on the land, there's a high incidence of depression.

This environmental relationship is further confirmed when people migrate from an area of low incidence to high incidence, and increase their risk of developing disease.

Seasonal factors, such as the rainy season, along with population movements in the area contribute to this unusually high incidence of cholera.