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Push to improve dementia diagnosis

15 May 2013 Last updated at 09:15 BST

The NHS in England has been told to push for a rapid rise in dementia diagnosis rates, so that by 2015, two out of three cases are identified.

Currently fewer than half of people with dementia have a diagnosis.

A senior adviser on public health says dementia cases could be halved if more were done on prevention.

Adam Brimelow reports.