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. 2023 Mar 3;162:105422. doi: 10.1016/j.jcv.2023.105422

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© 2023 The Authors. Published by Elsevier B.V.

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 — Schematic representation of the multi-country, single blinded, phase 2 study to test archived samples with the RT-RAA assay for SARS-CoV-2. Institut Pasteur de Dakar (IPD); Institut Pasteur de Madagascar (IPM); Kumasi Centre for Collaborative Research (KCCR); University of Ibadan (UI); Institut National de Recherche Biomédicale (INRB); University of Khartoum (UofK); and Makerere University (MAK).