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. 2020 Jul 15;20:100386. doi: 10.1016/j.imu.2020.100386

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© 2020 The Author

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. 2 — Topological transmission dynamics mapThese figures show the topological transmission dynamics maps using the time series of the number of cases in over 250 countries or regions collected from Jan 22, 2020, until the specified date on each map. These maps show the development of the similarities of the transmission dynamics between countries or regions over the period from February 20 to April 13, 2020.