SCI
4Feb
EarlyTransmissionDynamicsinWuhan,China,ofNovelCoronavirus–InfectedPneumonia
LiQun,GuanXuhua,WuPengetal.EarlyTransmissionDynamicsinWuhan,China,ofNovelCoronavirus-InfectedPneumonia.[J].N.Engl.J.Med.,,undefined:undefined.
BACKGROUND背景
Theinitialcasesofnovelcoronavirus(-nCoV)–infectedpneumonia(NCIP)oc-curredinWuhan,HubeiProvince,China,inDecemberandJanuary.WeanalyzeddataonthefirstconfirmedcasesinWuhantodeterminetheepidemio-logiccharacteristicsofNCIP.
中国湖北省武汉市于年12月和年1月分别发生新型冠状病毒(-nCoV)感染性肺炎(NCIP)首发病例。我们对武汉市首批例确诊病例资料进行分析，以确定NCIP的流行病学特征。
METHODS方法
Wecollectedinformationondemographiccharacteristics,exposurehistory,andillnesstimelinesoflaboratory-confirmedcasesofNCIPthathadbeenreportedbyJanuary22,.Wedescribedcharacteristicsofthecasesandestimatedthekeyepidemiologictime-delaydistributions.Intheearlyperiodofexponentialgrowth,weestimatedtheepidemicdoublingtimeandthebasicreproductivenumber.
我们收集了截至年1月22日报告的实验室确认的NCIP病例的人口学特征、暴露史和疾病时间表的信息。我们描述了病例的特征，并估计了关键的流行病学时延分布。在指数增长的早期，我们估计了疫情倍增时间和基本繁殖数。
RESULTS结果
AmongthefirstpatientswithconfirmedNCIP,themedianagewas59yearsand56%weremale.Themajorityofcases(55%)withonsetbeforeJanuary1,,werelinkedtotheHuananSeafoodWholesaleMarket,as