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. 2020 Aug 28;148:e194. doi: 10.1017/S0950268820001922

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© The Author(s) 2020

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — Timeline detailing key settings and exposures where contact tracing took place; and the number of identified contacts of the first two confirmed cases of COVID-19 identified in the UK, January 2020. Please note: Case 2 is not included as an identified contact of Case 1 in this timeline.