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‘Sewage doesn’t lie’ when tracking Covid-19 Wastewater samples must undergo an elaborate preparation process involving filtration, concentration and RNA extraction prior to detection. swissinfo.ch For over a year, scientists have been hunting for traces of Covid-19 in Swiss sewage, achieving several worldwide breakthroughs. But the project’s future is now in question. This content was published on May 5, 2021 - 09:00 May 5, 2021 - 09:00 Simon Bradley Born in London, Simon i...