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Continue to ChatSouth Korea using data from phones, credit cards to trace new Covid-19 infections https://newsin.asia/south-korea-using-data-from-phones-credit-cards-to-trace-new-covid-19-infections/
South Korea using data from phones, credit cards to trace new Covid-19 infections https://newsin.asia/south-korea-using-data-from-phones-credit-cards-to-trace-new-covid-19-infections/