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. 2021 Dec 16;811:152334. doi: 10.1016/j.scitotenv.2021.152334

Fig. 7.

Fig. 7

Estimation of the number of COVID–19 real active cases using a linear regression model. Scatterplot represents the logarithm of the viral load measured in WWTP Bens and the estimated number of COVID–19 real active cases before (A) and after (B) removing the three outliers detected. The linear fit (solid line) and the confidence band (shaded area) are also included.