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. 2021 Jun 30;83(2):e4–e5. doi: 10.1016/j.jinf.2021.06.024

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© 2021 The British Infection Association. Published by Elsevier Ltd. 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 — Total anti-SARS-CoV-2 S antibodies response in healthcare workers undergoing Pfizer BNT162b2 mRNA vaccination. Serum samples were drown at baseline, 21 days after the first vaccine dose, 30 days after the second vaccine dose (50 days after the first vaccine dose) and 3 months after the first vaccine dose in both anti-SARS-CoV-2 seronegative and seropositive subjects. Results are shown as median and interquartile range. The green arrows indicate the two vaccine doses administration.

* p<0.001

SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.