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. 2020 Nov 28;489:112937. doi: 10.1016/j.jim.2020.112937

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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. 3 — Percentage of detection of IgG1, IgG2, IgG3 and IgG4 in all 14 human samples positive on MN assay. Each column represents the contribution, in terms of percentage, each IgG subclasses versus SARS- CoV- 2 RBD. Error bars showing the variance of sample proportion.