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As the co-founder of Microsoft, and one of the world鈥檚 richest men, Bill Gates has long been a poster child for geek power. But, through his Gates Foundation, he is also at the centre of the effort to end the pandemic of 2020. In this edition of How To Vaccinate The World, Tim Harford talks with Bill Gates about what he鈥檚 doing, what others are doing, and what needs to happen next if we are going to vaccinate a global population against Covid 19.

Producer: Sandra Kanthal