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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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Plots of COVID-19 related Twitter activity superimposed to number of confirmed COVID-19 cases and cumulative number of deaths nationwide. Twitters are geolocated and aggregated by geopolitical regions for (a) Italy; (b) Spain and (c) United States. For each country we group and color code regions by geolocation in the following way: (a) Italy: Northern regions (blue), Central regions (red) and Southern regions (orange), (b) Spain: Northeastern regions (blue), Northwestern regions (green), Central regions (red), Southern regions (orange), Autonomous cities (yellow), (c) United States: Northeastern states (blue), Southeastern states (green), Midwestern states (red), Southwestern states (orange), Western states (yellow). The growth of confirmed COVID-19 cases nationwide (cumulative) is represented by grey bars while the cumulative number of COVID-19 deaths nationwide is represented by yellow bars.