Figure 1.

Matrix showing the pattern of mutations for the two wastewater samples. These results were provided by mapping on the SARS-CoV-2 reference genome (GenBank accession number NC_045512.2) using the CLC genomics software v7.5 (Qiagen Digital Insights, Germany), with default parameters. Only nonsynonymous mutations present in at least 10% of the reads were taken into account. Cells with a red background indicate hallmark mutations for a given SARS-CoV-2 variant. When the mutation was detected in the sewage sample, its frequency among sequencing reads is noted in each cell. Variant labels include the local nomenclature and Nextstrain, Pangolin and WHO nomenclatures.