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. 2020 Jul 31;26(11):1557.e1–1557.e7. doi: 10.1016/j.cmi.2020.07.038

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© 2020 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd.

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. 2 — Antibody response to SARS-CoV-2 N-antigen and S-antigen. (A) Dynamic trend to seropositivity for Roche total Ig, the 3 IgG anti-N assays (Abbott, Mikrogen, Euro NCP) and IgG anti-S assays (Diasorin, Euro S1). ^†p <0.05 for IgG anti-S1 assays vs. IgG anti-N assays. ^∗p < 0.05 for anti-S assays vs. IgG anti-N assays and Roche total Ig anti-N. (B) Dynamic trend to seropositivity for IgG anti-N and IgG anti-S assays in critical and non-critical patients.