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. 2020 Aug 28;22(8):e19629. doi: 10.2196/19629

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©Monika Pobiruchin, Richard Zowalla, Martin Wiesner. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 28.08.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Number of tweets per day for the hashtags ranked 1-8 (see Table 2) between February 9, 2020, and April 11, 2020, on a logarithmic scale. The capital letter "A" represents the naming of the disease by the World Health Organization on February 11, 2020. Blue rectangles: No tweets were collected between February 20 and 22 as well as between March 28 and 29 due to technical issues.