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Norovirus GII molecular typing. Distribution and abundance of norovirus GII strains identified from (A) raw sewage and final effluent (B) samples between June 2018 and August 2020. The amplicons from different sampling sites were pooled equimolar based on wastewater sample type and month of collection. The numbers in parentheses indicate the number of merged reads for each month. The key shows known RdRp-capsid combinations and putative novel recombinants (?).
