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. 2021 Jul 1;11:13678. doi: 10.1038/s41598-021-93042-w

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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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Demonstration that the reaction on social media can correctly detect and rank the epidemic’s impact on different regions one month ahead. The y-axis reports the cumulative number of deaths one month forward and the x-axis reports mean tweet intensity at the initial attention peak per geopolitical region of: (a) Italy; (b) Spain and (c) United States. The diameters of the circles are proportional to the population of the region.