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Unexpected Elements

Making a Covid-19 vaccine for two billion people

Duration: 1 hour, 2 minutes

on BBC World Service East and Southern Africa

Available for over a year

How to make 2 billion doses of a Covid-19 vaccine? New Covid therapy from llamas? Why do some mosquitoes prefer people? Did a mass asteroid bombardment cause Earth to freeze over? Show more

BBC World Service East and Southern Africa

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