 The Wuhan coronavirus outbreak has been characterized by rapid spread and high mortality rates. Early estimates suggest that the virus may have had a doubling time of six to seven days and a basic reproduction rate of 2.2 to 2.7. These findings were based on individual case reports from across China, as well as data on travel patterns and infections. The authors also developed two mathematical models to estimate the outbreak's dynamics Their results indicate that the virus could have had a doubling time of 2.3 to 3.3 days, with a median reproduction rate of 5.7. This suggests that aggressive measures such as active surveillance, contact tracing, quarantines, and social distancing are necessary to contain the virus. This article was authored by Stephen Sanche, Yan Tinglin, Chonggang Su, and others.