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. 2021 Apr 18;20(4):566–577. doi: 10.1016/j.jcf.2021.03.017

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© 2021 The Authors. Published by Elsevier B.V. on behalf of European Cystic Fibrosis Society.

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 — Flow chart on SARS-CoV-2 data collection.

1 Albania, Armenia, Austria, Belarus, Bulgaria, Croatia, Cyprus, Czech Republic, Georgia, Hungary, Israel, Latvia, Lithuania, Luxembourg, Republic of Moldova, North Macedonia, Portugal, Romania, Serbia, Slovak Republic, Slovenia, Ukraine

2 Belgium, Denmark, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Poland, Russia, Spain, Sweden, Switzerland, Turkey, United Kingdom