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A. Number of single nucleotide variants (SNV) per sample across 10 states (each state is represented by a different colour). B. Regression analysis, with 95% confidence interval, of the number of wastewater-derived SARS-CoV-2 SNVs detected versus the mean depth for each of the 52 samples with >90% coverage that were analysed. The colour code indicates the states in which the samples were collected.
