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. 2021 Jul 13;11:14421. doi: 10.1038/s41598-021-93538-5

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© The Author(s) 2021

Open Access This 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/.

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Final epidemic size for CT, CP, and combined CT + CP strategies for varying values of IDR at two fixed app adoption (A) rates. The cases where no strategy (none) or only manual CT (mCT) is applied are plotted as dashed lines for reference (same for both plots). Results correspond to maximum number of direct close contacts $C_{\max} = 3.1$ for CP and a delay $D = 3$ days since symptoms onset for CT. Darker and lighter coloured areas show the standard deviation and highest/lowest simulation values, respectively.