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. 2021 May 7;23:101200. doi: 10.1016/j.genrep.2021.101200

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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. S1 — Differences in species richness in COVID-19 (BD and China), and non-COVID (UK and USA) disease metagenomes. Rarefaction curves showing the influence of sequencing depth (number of reads per sample, X axis) on species richness (Y axis) in COVID-19 and non-COVID samples. The rarefaction curves representing the number of species per sample indicated that the sequencing depth was sufficient enough to fully capture the microbial diversity as existed.