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. 2022 May 17;22:474. doi: 10.1186/s12879-022-07453-9

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Trends in the overall and genotyping success rates of DBS and plasma specimens from 2016 to 2019. Overall genotyping success rates (GSR) were obtained by analysing all specimens genotyped in the 4 years (2016–2019). The GSR was a proportion of specimens that yielded clean sequences (genotypes) with the denominator being the total number of specimens that we attempted to genotype in that year or in all the 4 years for the overall GSR (see Table 1 for denominator values). The analysis was also independently done for DBS and plasma specimens