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. 2021 Dec 3;100(48):e27846. doi: 10.1097/MD.0000000000027846

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Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the Creative Commons Attribution License 4.0 (CCBY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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The effective reproduction number estimates based on laboratory-confirmed COVID-19 cases and public health control measures in Guangzhou. (A) The time distribution of imported and local cases by date of onset; (B) results were shown since January 14, calculated for the whole period (from January 14 to May 17) over 7-day moving average. The black horizontal line indicated R_t = 1, below which sustained transmission is unlikely so long as public health control measures were sustained, indicating that the outbreak is under control. The 95% credible intervals (CI) were presented as light bule shading. Daily estimates of R_t with 95% CrIs were shown in Supplementary Table 6, Supplemental Digital Content.