Northern Scotland has one of the highest rates of Huntington’s disease in the world, a study has found. The number of people living in the area who have the gene that causes the condition has been accurately counted for the first time in 35 years in research by the University of Aberdeen. Researchers used NHS family-based records to find there are more than 160 adults living in Grampian, Highland, Orkney, Shetland, and the Western Isles who have the gene but have not been tested, and scientists