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. 2021 Aug 27;12:5173. doi: 10.1038/s41467-021-25207-0

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Weekly incident (a, b) confirmed cases and (c, d) deaths from COVID-19 in Germany and Poland according to data sets from the European Centre for Disease Prevention and Control (ECDC) and the Centre for Systems Science and Engineering at Johns Hopkins University (JHU). The study period covered in this paper is highlighted in grey. Important changes in interventions and testing are marked by letters/numbers and dashed vertical lines. Sources containing details on the listed interventions are provided in Supplementary Note 5.