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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Clear spells and showers overnight. Drier and brighter and a little warmer on Saturday. Rain and wind into Sunday morning
Higher risk of sunburn for the first part of the weekend with some late May sunshine
Your northwest pollen forecast for the next few days