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. 2021 Oct 28;145:105018. doi: 10.1016/j.jcv.2021.105018

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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. 3 — Performance of high-throughput pool testing for SARS-CoV-2 detection. A: Pool testing started on April 9, 2020. The number of pooled samples per day and the percentage of reduced PCR-tests compared to individual testing (blue line) are displayed. B: The number of samples tested in pools and C: The number of pools tested during a period of 44 weeks are shown. D: Correlation of Ct-values of n = 128 positive pools and the respective individual positive sample. Correlation was performed only if a pool and the respective positive individual sample was analyzed with the same assay. E: Violin plot of adjusted Ct-values (Ct_a) of n = 175 individual positive samples detected in pools. The reduced number of data points is due to a software problem, so that some data could not be retrieved. Dotted lines represent quartiles and the dashed line the median.