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. 2020 Dec 16;21(Suppl 5):582. doi: 10.1186/s12864-020-06982-4

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© The Author(s) 2020

Open AccessThis 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/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 6 — Deciding whether source is present in a given set of hosts. Here, every circle represents a host, belonging to an outbreak, and green circle represents mean. Edges represent distances between mean hosts and hosts in an outbreak. If there is a host, that is close to mean (so that the distance is smaller than a threshold, case (a)), we conclude, that source is present in an outbreak. Otherwise, analyzed set of hosts doesn’t include the outbreak source (case (b))