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. 2022 Jul 2;844:157121. doi: 10.1016/j.scitotenv.2022.157121

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Fig. 3 — Longitudinal measurements of SARS-CoV-2 virus concentrations in wastewater samples using N1 and E detection assays, and their correlations with the number of daily new cases in the catchment areas of the three WWTPs. Red line: the clinical daily new cases number using 7-day moving average value. Blue line: the virus concentration (N1) using 7-day moving average value. Green line: the virus concentration (E) using 7-day moving average value.