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COVID-19 outbreaks in Wuhan, Beijing and Dalian share certain similarities
Published on: 2020-07-30
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China's top epidemiologist said the recent COVID-19 outbreaks in Wuhan, Beijing and Dalian share certain similarities and did not come about by coincidence, as they all took place in the cold contaminated environment of seafood markets, and the virus may have infected people through aerosols.
 

In an interview with Chinese media on Wednesday, Wu Zunyou, the chief epidemiologist of the Chinese Center for Disease Control and Prevention, said their humid and low-temperature environment is more conducive for the novel coronavirus to survive.
 

As long as there is contamination, the virus can become concentrated and will not be easy to inactivate, resulting in the virus spreading, Wu said.
 

Wu revealed that an experiment carried out in Beijing's Xinfadi market, in which a fluorescent powder was used to simulate the virus, showed that if the environment was contaminated, the virus could infect people through aerosols. Workers would then pollute the environment after becoming infected, forming a mixed transmission mode.
 

To prevent the presence of novel coronavirus in humid environments, Wu suggested that places with environments similar to those in seafood markets should get adequate ventilation, which will help lower the risk of infection.
 

According to the National Health Commission on Thursday, Dalian reported five domestic confirmed patients, four of whom were asymptomatic. At the same time, Beijing also reported one confirmed case relating to Dalian.
 

However, Wu said the regional epidemic in Dalian has no specific connection with the outbreak in Beijing, adding that there is a larger possibility that the epidemic in Dalian was caused by contaminated imported seafood.
 

The local government said Wednesday that most confirmed patients are employees from the Dalian Kaiyang Seafood Company or their close contacts.
 

According to Wu, Dalian has basically prevented the COVID-19 outbreak from spreading, and believes there will not be a larger scale epidemic in the city.
 

Many patients were found before they even showed any symptoms, and as the current new confirmed cases were asymptomatic, they do not pose a risk to society, Wu said.
 

大连、北京、武汉疫情,存在惊人相似点!

7月29日晚,央视新闻连线中国疾控中心流行病学首席专家吴尊友解读本轮大连疫情。吴尊友介绍,通过大数据分析,大连疫情与北京疫情没有确切关系。目前,大连疫情规模基本已经锁定,不会再有更大规模病例出现。
 

吴尊友表示,在北京新发地疫情发生后,就联想到武汉华南海鲜市场,也是与海产品销售区域有关。这一系列情况都提示,有共同的潮湿、低温环境,适合病毒存活。
 

武汉华南海鲜市场、北京新发地市场,以及大连这家海鲜加工厂都存在通风不畅的问题。吴尊友提醒,全国都需要加强这些环境的检测和管理,尤其是通风。

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