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. 2021 Mar 30;2(4):e138. doi: 10.1016/S2666-5247(21)00030-6

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© 2021 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license

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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Correlation between anti-SARS-CoV-2 IgG titres 24–48 h after the last transfusion and improvement in clinical status in patients with COVID-19 (n=14)

Datapoints represent each patient. Clinical improvement was defined as an improvement of 1 point or more on the 10-point WHO Clinical Progression Scale for COVID-19 5 days after the last transfusion and the clinical status before transfusion.