We could be entering the era of Alzheimer's treatments, after the second drug in under a year has been shown to slow the disease.

Experts said we were now "on the cusp" of drugs being available, something that had recently seemed "impossible".

The company Eli Lilly has reported its drug - donanemab - slows the pace of Alzheimer's by about a third.

However two volunteers, and possibly a third, died as a result of dangerous swelling in the brain.

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