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. 2022 Oct 5;556:111296. doi: 10.1016/j.jtbi.2022.111296

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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. 8 — Observed numbers with antibodies to SARS-CoV-2, from the national commercial laboratory (Anti-N) or blood donor (Anti-S or Anti-N) seroprevalence study, and predicted numbers temporarily immune (Removed) from simulations with (A and B) and without (C and D) vaccination on 25 December 2020 (A and C) and 4 April 2021 (B and D). Vaccination had no discernible impact on 25 December 2020 serology.