This phenomenon has been studied, but is currently thought to be because of lifestyle differences. See "The Health Toll of Immigration": http://www.nytimes.com/

This phenomenon has been studied, but is currently thought to be because of lifestyle differences. See "The Health Toll of Immigration": http://www.nytimes.com/2013/05/19/health/the-health-toll-of-immigration.html http://www.nytimes.com/2013/05/19/health/the-health-toll-of-...