When Rosa Inchausti and her colleagues started testing wastewater in Tempe, Arizona, it was 2018 and they were not looking for coronavirus. They were tracking the opioid epidemic.
원문출처 : https://www.cnn.com/2020/10/28/health/covid-sewage-testing-spike/index.html
원문출처 : https://www.cnn.com/2020/10/28/health/covid-sewage-testing-spike/index.html