Around half the people in the North West currently living with Alzheimer's don't actually know they have it.
And just like cancer - the earlier you get a diagnosis, the better the outcome.
Now, scientists at Lancaster University have developed a simple test could mean thousands will get the treatment they need far sooner.
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Grey start but improving with some warm sunshine by afternoon
Misty again overnight. Murky and damp conditions returning to the Pennines. Grey start Friday but warm sunshine will develop from the west
Your weekend weather outlook for the Northwest and Isle of Man