Shocking new figures reveal that the number of people with dementia is expected to almost double in the next twenty years. In a special edition of Health Check, to mark World Alzheimer's Day, Claudia Hammond talks to Professor Martin Prince from the Institute of Psychiatry at King’s College, London, about why we are sitting on a global time-bomb, and what can be done.

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28 minutes

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Tue 22 Sep 2009 00:32 GMT

Zika: a new pandemic?

Zika virus emerggency talks

The explosive spread and impact of the mosquito-borne virus.