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Covid-19: do we need more than one vaccine? Podcast
Hannah Devlin speaks to Prof Andrew Pollard about the work being done by different teams around the world to create a vaccine for Covid-19, and where his team at Oxford University fit into this international effort. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>