The claim: Traces of coronavirus were found in samples of wastewater collected prior to the pandemic Our ruling: More information needed
"Also, we know SARS-CoV-2 to be highly transmissible, at least in its current form. If this result is a true positive it suggests the virus was present in the population at a high enough incidence to be detected in an 800ml sample of sewage, but then not present at a high enough incidence to be detected for nine months, when no control measures were in place," Crossan further adds.
The University of Barcelona study, as well as those out of Italy and Brazil, is in preprint and awaiting peer-review.The claim that novel coronavirus was discovered in wastewater samples predating the pandemic needs more information before it can be fully rated, based on our research. It is true that a sample yielded a positive result in testing for coronavirus. However, a positive finding can result from a variety of scenarios, including contamination from a positive sample or a false positive.
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