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引用来源：JKMS 期刊
https://jkms.org/DOIx.php?id=10.3346/jkms.2020.35.e415
原文标题：
Evidence of Long-Distance Droplet Transmission of SARS-CoV-2 by Direct Air
Flow in a Restaurant in Korea
韩国某餐厅内 COVID-19 飞沫透过直接气流长距离传播证据
结论：
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.
室内如果有来自感染者的直接气流 有可能使飞沫传播距离大于2公尺
paper 内也建议更新防疫准则
带原B 传染给 个案A C
距离与暴露(exposure)时间
室内距离分别为 6.5 / 4.8 公尺
https://i.imgur.com/42WxTDv.jpeg
个案出现症状与确诊日期
https://i.imgur.com/1PXKkgV.png
个案在餐厅当日接触史
https://i.imgur.com/iNCgvgb.png
当日餐厅布局与空调气流方向
https://i.imgur.com/h981Hvj.png
研究透过室内监视器 人物访谈 以及手机地点资讯
考虑现场的空调气流方向速度 个案之间的距离
还有访客的移动
此次共有 3个案 （排除个案D
主要是 个案A 距离6.5公尺 且与 带原个案B 无直接接触
只在有空调的室内暴露5分钟
The 39 environment samples for SARS-CoV-2 were all negative by rRT-PCR. The
results of genome sequencing of the three patients were presented as all
three cases' genomic types were GH type and identical for each other
39个现场物品采样皆为阴性 3个案的病毒基因皆为 GH型
There are some limitations to this study. First, we did not assess air flow
using computational fluid dynamics. In addition, the air flow measurement
can't reflect all the same situations because opening of doors and motions of
cases and visitors were not reproduced. However, air flow direction and
velocity were identified between the infector and infectees using an
anemometer in the most similar environment as possible. Second, environmental
samples were collected at 11 days after the inspector visit. Though all these
results were negative, this was not proof against airborne transmission.
此项研究仍有几个缺陷...