Sewage testing can be used for early detection of disease. (Shutterstock) Lawrence Goodridge, University of Guelph The COVID-19 pandemic has reignited interest in wastewater surveillance, where sewage systems are monitored for the presence of viruses, bacteria and other pathogens. Non-infective fragments of the virus’s genetic material have been found in untreated wastewater in Italy, Spain, France, the United States and …
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