RT Journal Article SR Electronic T1 Origin time and epidemic dynamics of the 2019 novel coronavirus JF bioRxiv FD Cold Spring Harbor Laboratory SP 2020.01.25.919688 DO 10.1101/2020.01.25.919688 A1 Zhang, Chi A1 Wang, Mei YR 2020 UL http://biorxiv.org/content/early/2020/01/27/2020.01.25.919688.abstract AB The 2019 novel coronavirus (2019-nCoV) have emerged from Wuhan, China. Studying the epidemic dynamics is crucial for further surveillance and control of the outbreak. We employed a Bayesian framework to infer the time-calibrated phylogeny and the epidemic dynamics represented by the effective reproductive number (Re) changing over time from the genomic sequences available from GISAID. The origin time is estimated to be December 17, 2019 (95% CI: December 5, 2019 – December 23, 2019). The median estimate of Re ranges from 0.2 to 2.2 and changes drastically over time. This study provides an early insight of the 2019-nCoV epidemic.