Since from December 2019，the outbreak of coronavirus disease 2019（COVID-19） caused by 2019 novel coronavirus（2019-nCoV） has spread rapidly. The World Health Organization（WHO），the CPC Central Committee and the State Council pay highly attention to this major epidemic that threatens people’s life and influences socio-economic development. 2019-nCoV is a kind of novel coronavirus of β genus，which has a long incubation period and strong infectivity. COVID-19 has been defined as class B infectious diseases in China，but measures of class A infectious diseases have been taken to prevent and control. This article focuses on the development of 2019-nCoV and the epidemic situation，and will elaborate on the characteristics of 2019-nCoV，the clinical characteristics of COVID-19，and the relationship between 2019-nCoV and pregnancies, neonates，children and drug treatment.
