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. 2020 Aug 18;751:141750. doi: 10.1016/j.scitotenv.2020.141750

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Fig. 8 — Correlation between the measured SARS-CoV-2 M-gene copy loads and the nominal numbers of (A) cumulative and (B) acute COVID-19 cases on April 8th, 2020, in the catchment areas of the 9 WWTP studied. In comparison, creatinine-corrected numbers of (C) cumulative and (D) acute COVID-19 cases are displayed. For regressions and coefficients of determination, see Supplementary Table S5.