A rare mutation helped one man stave off Alzheimer’s for decades
It’s the second such case ever to be reported
![An illustration of tau proteins, in orange, with blue and purple proteins floating around.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/05/051223_SM_alzheimer_feat.jpg?fit=1030%2C580&ssl=1)
Aggregations of proteins called tau tangles (orange clumps in this illustration of a brain cell) are one of the major signs of Alzheimer's disease.
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