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. 2021 Jan 8;12:194. doi: 10.1038/s41467-020-20206-z

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Estimated population-level search rates. Based on survey data in the presence of reported household flu (in light yellow) and absence of reported household flu (in dark grey). The x-axis indicates a proportion of searches and the y-axis indicates the estimated density of searches where household flu = 0, 1.