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. 2021 Jun 14;72(Suppl 3):S210–S216. doi: 10.1093/cid/ciab211

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© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — Number of large-scale surveys ever conducted by country for the WHO Africa region. Left side shows the number of all surveys that collected blood samples by sample type. Right side shows all demographic and health surveys ever conducted, whether they collected blood samples and sample type, where relevant. Where multiple samples were taken, surveys using WBS were categorized as WBS, those using a mixture of DBS and RDT were categorized as DBS, and those using RDT and other types of tests were categorized as RDT. Abbreviations: CAR, Central African Republic; DBS, dry blood spot; DRC, Democratic Republic of Congo; NS, not stated; RDT, rapid diagnostic test; STP, Sao Tome and Principe; WBS, whole blood sample.