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. 2020 Aug;12(8):4434–4449. doi: 10.21037/jtd-20-2363

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2020 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Timeline of major events in mainland China of the COVID-19 outbreak from December 2019 to March 2020. Blue, events in Wuhan; green, events in mainland China; yellow, research progress; red, announcements by the WHO.