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. 2021 Jun 19;59(5):635–642. doi: 10.1016/j.resinv.2021.06.003

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© 2021 The Japanese Respiratory Society. Published by Elsevier B.V. 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 — Antibody titer transition after COVID-19 vaccination (Coronavirus Modified Uridine RNA Vaccine, BNT162b2, Comirnaty). The dotted line shows the cutoff value. The cutoff IgG and IgM titers are 0.1 AU/mL and 0.2 AU/mL, respectively. A, IgG titer transition. B, IgM titer transition. Ig, Immunoglobulin; COVID-19, coronavirus disease.