Guardian Science Weekly

Covid-19: does more testing always mean more cases?

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Since the beginning of the pandemic, ‘test, test, test’ has been the key message from epidemiologists, infectious disease specialists and healthcare professionals alike. But how does a country know if it’s doing sufficient testing? Or that it’s catching enough of the asymptomatic cases? Nicola Davis speaks to Prof Rowland Kao about the positivity rate, a value that can help to answer some of these difficult questions. Help support our independent journalism at theguardian.com/sciencepod
4 Aug 2020 English United Kingdom Science · Nature

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