Our manuscript was based on surveillance cases of COVID-19 identified before January 26, 2020. As of February 20, 2020, the total number of confirmed cases in mainland China has reached 18 times of the number in our manuscript. While the methods and the main conclusions in our original analyses remain solid, we decided to withdraw this preprint for the time being, and will replace it with a more up-to-date version shortly. Should you have any comments or suggestions, please feel free to contact the corresponding author. ### Competing Interest Statement The authors have declared no competing interest. ### Funding Statement This work was financially supported by grants from the China Mega-Project on Infectious Disease Prevention (No. 2018ZX10713001, 2018ZX10713002, 2017ZX10103004 and 2018ZX10101003-002), the National Natural Science Funds (No. 81825019), and the U.S. National Institute of Health (R01 AI139761 and R01 AI116770). ### Author Declarations All relevant ethical guidelines have been followed; any necessary IRB and/or ethics committee approvals have been obtained and details of the IRB/oversight body are included in the manuscript. Yes All necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived. Yes I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). Yes I have followed all appropriate research reporting guidelines and uploaded the relevant EQUATOR Network research reporting checklist(s) and other pertinent material as supplementary files, if applicable. Yes Request for individual case data should be directed to Chinese Center for Disease Control and Prevention. Summary data used for tables and figures in this manuscript can be requested by emailing the corresponding authors.
Yang Yang, Lu Qingbin, Liu Mingjin, Wang Yixing, Zhang Anran, Jalali Neda, Dean Natalie, Longini Ira, Halloran M. Elizabeth, Xu Bo, Zhang Xiaoai, Wang Liping, Liu Wei, Fang Liqun. (2020). Epidemiological and clinical features of the 2019 novel coronavirus outbreak in China. Cold Spring Harbor Laboratory Press