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. 2020 Nov 10;758:143578. doi: 10.1016/j.scitotenv.2020.143578

Fig. 2.

Fig. 2

Temporal relationships between the number of SARS-CoV-2 infection cases and the presence of SARS-CoV-2 in wastewater samples in Ishikawa and Toyama prefectures. Arrows indicate the date and WWTP of the sample collection and occurrence of SARS-CoV-2 in the sample: arrows surrounded by a dashed line indicate that SARS-CoV-2 was not detected in the sample; white arrows indicate SARS-CoV-2 was detected but was not quantifiable (1.0 × 100–1.0 × 101 copies/reaction); colored arrows indicate SARS-CoV-2 was detected with quantifiable levels (1.2 × 104–3.5 × 104 copies/L). For samples deemed positive by multiple qRT-PCR assays, the assay showing the highest detected concentration was selected. Solid line and dashed lines indicate the number of confirmed cases and inpatients, respectively, in each prefecture.