FILE PHOTO: Samples are collected during a simulation for drive-through polymerase chain reaction (PCR) tests for the coronavirus disease (COVID-19) at Edogawa ward in Tokyo, Japan April 22, 2020. REUTERS/Issei Kato
TOKYO (Reuters) - Japanese researchers confirmed the presence of the coronavirus in wastewater plants, a finding that could serve as a signal for future outbreaks.
The study tested water from four treatment plants in Ishikawa and Toyama prefectures in western Japan. Out of 27 samples, 7 were positive for the SARS-CoV2 virus, according to a preprint of a study by Toyama Prefectural University, Kanazawa University and Kyoto University.
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