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. 2021 Apr 30;10:100376. doi: 10.1016/j.trip.2021.100376

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© 2021 The Author(s)

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. 1 — Parallel timeline of contagion development (February 2020-February 2021) for the four case studies (Oslo and Agder on uppermost graph, Vienna and Tyrol on lowermost graph) and major national events in the pandemic for Norway and Austria (timeline in the figure center).