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. 2020 May 6;129:104791. doi: 10.1016/j.ssci.2020.104791

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© 2020 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. 8 — Number of flight departures during 19 to 25 March 2020, compared to the number of departures during 30 January to 5 February 2020. Green colour indicates an increase in flight numbers, pink a decrease. Source: OpenSky Network.