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SARS-CoV-2 RNA Concentrations. N1 (A) and N2 (B) gene target concentrations determined using different concentration methods for six wastewater samples reported in gene copies/L wastewater. N1 (C) and N2 (D) gene target concentrations determined using different concentration methods for six wastewater samples reported in gene copies/uL RNA template. Black horizontal lines indicate LoQs. WWTP are A-E, DI is deionized water, and NTC is no template control.
