Evidence of Long-Distance Droplet Transmission of SARS-CoV-2 by Direct Air Flow in a Restaurant in Korea.
Evidence of Long-Distance Droplet Transmission of SARS-CoV-2 by Direct Air Flow in a Restaurant in Korea.
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DOI：
10.3346/jkms.2020.35.e415
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发表时间：
2020-11-30
影响因子：
4.5
通讯作者：
Lee JH
中科院分区：
文献类型：
--
作者：
Kwon KS;Park JI;Park YJ;Jung DM;Ryu KW;Lee JH
严重急性呼吸综合征冠状病毒2的传播方式主要为飞沫传播。然而，最近出现了一种关于空中传播的可能性的争论。6月17日，韩国爆发与飞沫远距离传播有关的冠状病毒病2019年(新冠肺炎)疫情。流行病学调查是基于对闭路电视图像的个人访谈和数据收集以及手机位置数据进行的。韩国疾病控制和预防机构开发的疫情调查支持系统用于追踪接触者。在考虑暴露地点的餐厅，调查了空气流动的方向和速度，病例之间的距离，以及来访者的移动。此次暴发共确诊3例，在一家安装了天花板空调的餐厅内，测得感染者和感染者之间的最大气流速度为1.2m/S。该指示病例是在距离感染者6.5m处感染的，接触时间为5分钟，没有任何直接或间接接触。如果感染者有直接气流，飞沫传播的距离可超过2米。因此，需要更新新冠肺炎的预防、接触者追踪和检疫指南，以控制这种高传染性疾病。
The transmission mode of severe acute respiratory syndrome coronavirus 2 is primarily known as droplet transmission. However, a recent argument has emerged about the possibility of airborne transmission. On June 17, there was a coronavirus disease 2019 (COVID-19) outbreak in Korea associated with long distance droplet transmission. The epidemiological investigation was implemented based on personal interviews and data collection on closed-circuit television images, and cell phone location data. The epidemic investigation support system developed by the Korea Disease Control and Prevention Agency was used for contact tracing. At the restaurant considered the site of exposure, air flow direction and velocity, distances between cases, and movement of visitors were investigated. A total of 3 cases were identified in this outbreak, and maximum air flow velocity of 1.2 m/s was measured between the infector and infectee in a restaurant equipped with ceiling-type air conditioners. The index case was infected at a 6.5 m away from the infector and 5 minutes exposure without any direct or indirect contact. Droplet transmission can occur at a distance greater than 2 m if there is direct air flow from an infected person. Therefore, updated guidelines involving prevention, contact tracing, and quarantine for COVID-19 are required for control of this highly contagious disease.
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