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. 2022 Mar 3;22:208. doi: 10.1186/s12879-022-07209-5

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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. 4 — A Reported non-COVID-19 institutional outbreaks (7-day moving average) in 2020 and 2017–2019. 7-day moving average of reported outbreaks in institutions in 2020 (orange line) and the average of reported outbreaks in 2017–2019 (blue line). The arrows indicate the timing of the measures taken by the Dutch government: (1) advised to work from home as much as possible, schools and bars/restaurants were closed; (*) no visitors allowed in the nursing homes; (3) elementary schools reopened and contact-based professions allowed to be carried out again; (4) restaurants/bars, museums and high schools reopened; (#) visitors were allowed in nursing homes. Hygiene measures and 1.5 m interpersonal distancing were implemented from week 11 throughout the total study period. B Cumulative number of reported non-COVID-19 institutional outbreaks in 2020 and 2017–2019. Cumulative number of reported outbreaks in institutions from 2020 compared to the average in 2017–2019