10:50More or LessThe magical maths of pool testingBBC World Service Duration: 9 minutes Mon 21st Sep 2020, 10:50 on BBC World Service Americas and the CaribbeanAvailable for over a yearListen nowCould pool testing hold the key to ramping up Covid-19 testing? Show more GenresFactualFormatsMagazines & ReviewsBrandMore or Less Source: BBC Online