The race to find a treatment for dementia

Dementia is one of our greatest fears as we reach older age. Health expert Dr Norman Swan investigates the long and controversial search for an Alzheimer's drug, and the science behind current theories of treatment. Is it heading in the right direction? And while the world waits for a cure, can lifestyle choices help delay the onset of dementia?

Courtesy of ABC News In-depth on YouTube. Watch on YouTube ↗

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