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Bill Gates

Duration: 04:01

Bill Gates, explains his optimism for a world free of the debilitating disease, polio.

Available since: Wed 30 Jan 2013

This clip is from

The Richard Dimbleby Lecture Bill Gates: The Impatient Optimist

Philanthropist Bill Gates explains his optimism for a world free of polio.

First broadcast: 29 Jan 2013

Image for Bill Gates: The Impatient Optimist Not currently available on BBC iPlayer

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