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. 2022 Jan 25;821:153228. doi: 10.1016/j.scitotenv.2022.153228

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Fig. 5 — Comparing viral concentration after different incubation time frames for (A) SARS-CoV-2 N and (B) PMMoV gene copies/L of raw influent wastewater. Samples either had no incubation time with PEG (0 h) or a 12-h incubation time (12h) ((N) P > 0.05, n = 12 and (PMMoV) P > 0.05, n = 12).