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. 2021 Aug 13;83(5):573–580. doi: 10.1016/j.jinf.2021.08.019

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Fig. 1 — Seroprevalence in student and staff sKIDsPLUS participants using the Abbot N, Roche N and Roche S assays in Round 1 (September 2020), Round 2 (November/December 2020) and Round 3 (March/April 2021).