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. 2019 Nov 4;21(11):e14007. doi: 10.2196/14007

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©Zubair Shah, Didi Surian, Amalie Dyda, Enrico Coiera, Kenneth D Mandl, Adam G Dunn. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 04.11.2019.

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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A network visualization representing the subset of 98,663 Twitter users who posted tweets including links to vaccine-related Web pages at least twice and were connected to at least one other user in the largest connected component. Users who posted at least 2 high-credibility Web pages and no low-credibility Web pages (cyan) and those who posted at least two low-credibility Web pages and no high-credibility Web pages (orange) are highlighted. The size of the nodes is proportional to the number of followers each user has on Twitter, and nodes are positioned by a heuristic such that well-connected groups of users are more likely to be positioned close together in the network diagram.