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. 2022 Feb 5;41:100493. doi: 10.1016/j.sste.2022.100493

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© 2022 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig 5 — Patterns of significant pure spatial scan statistic clusters (indicated by black circles with the text C on the maps) of COVID-19 at the postal code level and the relative risk in the City of Helsinki for three aggregated time periods: 28.10.2020–9.12.2020, 23.12.2020–10.2.2021 and 24.2.2021–24.3.2021. Maps on the left present pure spatial scan statistics (a1, b1 and c1) and maps on the right (a2, b2 and c2) present pure spatial scan statistic with “Gini optimized” clusters.