Putting dementia on the map - Tom Russ

Dementia: it’s difficult to think of a more pressing topic. But what do we really know about dementia and about the ways to prevent it?Dr Tom Russ tells us that people living in the north of the UK and Sweden are 2 to 3 times more likely to develop dementia.Why is this the case?Tom explains that we have some good candidates to explore in more detail.