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. 2021 Oct 30;21:1119. doi: 10.1186/s12879-021-06810-4

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© The Author(s) 2021

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. 1 — Distribution of the combination of 15 symptoms reported by confirmed and ‘not a case’ individuals displayed using an ‘Upset’ plot. Only symptoms reported in > 100 people and combinations that occurred in 5 or more individuals are included. The total number of PCR confirmed cases (top plot) was 1125 and the total number of non-cases (bottom plot) was 4750. A plot including ‘probable’ cases is provided in Additional file 1: Fig. S1