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. 2020 Mar 4;80(6):671–693. doi: 10.1016/j.jinf.2020.02.025

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© 2020 The British Infection Association. Published by Elsevier Ltd. All rights reserved.

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 — Phylogenic overview and putative model of transmission of SARS-CoV-2. (A) Potential routes of cross-species transmission of SARS-CoV-2. The dashed line indicates potential transmission routes. Abbreviation of SARS-CoV-2 indicates 2019 novel coronaviruses. (B) The phylogenetic relationship among SARS-CoV-2 and other coronaviruses in bats, birds, mice, camels, swine, pangolins, and humans. Red color indicates the human-origin coronaviruses. The scale bar represents the number of nucleotide substitutions per site (subs/site).