As the need for widespread Covid-19 testing grows, officials are looking to flush out hidden cases of the virus by examining sewage.
Groups of scientists around the world are using wastewater testing as a non-invasive way to measure the prevalence of coronavirus in their communities.
Local governments in the US are also turning to the tests, which detect traces of coronavirus genetic material -- known as RNA -- in fecal matter.
The data can be used to gain a sense of how many people may have had the virus asymptomatically and are passing it through, in addition to those testing positive because they are outwardly sick, New Castle County Executive Matt Meyer told CNN.
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