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. 2022 Apr 23;50(6):1483–1490. doi: 10.1007/s15010-022-01824-9

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Fig. 1 — PCR-confirmed SARS-CoV-2 infections in Saxony between March 2020 and September 2021. Timepoints of study visits in the schools (blue arrows) and the timelines of lockdowns (yellow arrows)