SARS-CoV-2 was detected in Barcelona sewage long before the declaration of the first COVID-19 case, indicating that the infection was present in the population before the first imported case was reported. Sentinel surveillance of SARS-CoV-2 in wastewater would enable adoption of immediate measures in the event of future COVID-19 waves. Article Summary Line SARS-CoV-2 genomes occur in sewage long before the declaration of COVID-19 cases among the population.
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Chavarria-Miró et al. (2020) studied this question.
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