zh-cn	相较于SARS疫情防控，此次疫情防控的主要难点包括哪些方面？ 
en-us	What are the major difficulties in preventing and controlling COVID-19 in comparison with SARS? 

zh-cn	相较于2003年的SARS疫情防控，本次新冠肺炎疫情防控的主要难点体现在以下几个方面： 
en-us	Compared with SARS in 2003, the major difficulties of preventing and controlling the COVID-19 (novel coronavirus pneumonia) epidemic include the following aspects. 

zh-cn	1.新冠病毒隐蔽性更强。
en-us	First, the novel coronavirus is more difficult to detect. 

zh-cn	从疾病表现来看，新冠病毒感染者不仅有轻症、普通、重症、危重症患者，还有无症状感染者，具有很强的隐蔽性。
en-us	With regards to symptoms, the COVID-19 patients range from being mild, moderate, severe, critical, to even asymptomatic. 

zh-cn	而SARS感染者几乎都会表现出发高烧的情况，能够很快被识别出来以控制住传染源。 
en-us	The SARS patients almost all had high fever, which could be quickly identified, facilitating control of the infection source. 

zh-cn	2.新冠病毒传播途径更多样。
en-us	Second, the transmission modes of the novel coronavirus are more diverse. 

zh-cn	新冠病毒的传播途径包括直接传播、气溶胶传播和接触传播。
en-us	COVID-19 can be transmitted by droplets, aerosol and contact. 

zh-cn	直接传播是指患者喷嚏、咳嗽、说话的飞沫，呼出的气体近距离直接吸入导致的感染；
en-us	Droplet transmission usually refers to infection caused by sneezing, coughing and talking droplets as well as exhaled gas of patients, generally over short distances. 

zh-cn	气溶胶传播是指飞沫混合在空气中，形成气溶胶，吸入后导致感染；
en-us	Aerosol transmission is defined as dissemination of either airborne droplet nuclei or small particles in the respirable size range containing infectious agents that remain infective over time and distance. 

zh-cn	接触传播是指飞沫沉积在物品表面，接触污染手后，再接触口腔、鼻腔、眼睛等粘膜，导致感染。
en-us	Contact transmission involves hand transfer of surface contamination to mouth, nose or eyes. 

zh-cn	SARS主要传播方式是人与人的近距离接触。 
en-us	The main mode of SARS transmission is close contact. 

zh-cn	3.新冠病毒传染范围更广。
en-us	Third, the novel coronavirus spreads more widely. 

zh-cn	武汉有将近500万的流动人口，在春节前沿高铁、高速、航空枢纽流向全国各地，导致新冠肺炎疫情全国大暴发。
en-us	Nearly 5 million of the floating population in Wuhan headed to different places prior to the Spring Festival, which directly led to the outbreak across the country. 

zh-cn	而SARS传染范围主要限于北京和广东。 
en-us	However, the scope of SARS infection is largely limited to Beijing and Guangdong. 

zh-cn	4.全国互联互通程度更高。
en-us	Fourth, China is more interconnected. 

zh-cn	武汉市是中国重要的东西南北交通枢纽，2019年中国的交通吞吐量、空中和陆路线路交叉密集程度相比于2003年有了显著提升。
en-us	As an important transportation hub in China, Wuhan saw significant improvement in traffic throughput and intersection density of air and land lines in 2019, compared with those in 2003.