The Guardian

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 Covid-19: How do you calculate herd immunity? 

Science Weekly

Twice a week, the Guardian brings you the latest science and environment news

 Herd immunity represents the percentage of a people in a population who need to be immune to a disease in order to protect those who aren’t. Early on in the pandemic, researchers estimated the herd immunity threshold for Covid-19 to be 60%. Following a question from a listener, Ian Sample speaks to Rachel Thomas to explore the maths and find out exactly how herd immunity is calculated. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a> 

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Covid-19: How do you calculate herd immunity?

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