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. 2022 Jun 20;20:233. doi: 10.1186/s12916-022-02431-z

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© The Author(s) 2022

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Incidence of SARS-CoV-2 cases in Switzerland and total number of daily samples during the data collection period (March 2020–April 2021). A Total number of daily RT-PCR confirmed SARS-CoV-2 cases in Switzerland for the period of March 2020–April 2020 obtained from official statistics [21]. B Total number of positive and negative daily blood samples across all study sites (SenASTrIS antibody test result)