What is herd immunity?
Fergus Walsh, James Gallagher and Tulip Mazumdar compare the UK government's coronavirus strategy with the rest of the world's.
Plus, should you change your plans this weekend?
With special guest Dr Kim Roberts, Leader of the Virology Research Group at Trinity College Dublin.
Produced by Lucy Grey and Sam Bonham.
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Please note that all future episodes will be published on the BBC’s Newscast feed.