论文标题
在Covid-19 Coronovirus的空中方面
On the airborne aspect of COVID-19 coronovirus
论文作者
论文摘要
这是一种广泛接受的观点，即Covid 19是通过表面污染传输的，或者是通过未感染的人与受感染者的密切接触。表面污染通常会发生在呼气/打喷嚏/咳嗽的病人的感染水滴落在附近的表面上时。为了遏制这一点，世界卫生组织（WHO）提倡社会疏远和良好的手卫生建议。我们认为，Covid 19冠状病毒也可以在充满Covid病人产生的感染液滴的泛云中空降。基本计算表明，$ 5〜μm $的呼吸感染液滴可以悬浮约9.0分钟，而$ 2〜μm $ $ $液滴可以悬浮约一个小时！在某些情况下，疾病预防控制中心（CDC）（防止疾病控制和预防中心）的社会距离为3英尺和6英尺（疾病控制中心）的建议是不够的。
It is a widely accepted view that COVID 19 is either transmitted via surface contamination or via close contact of an un-infected person with an infected person. Surface contamination usually happens when infected water droplets from exhalation/sneeze/cough of COVID sick person settle on nearby surfaces. To curb this, social distancing and good hand hygiene advise is advocated by World health Organization (WHO). We argue that COVID 19 coronovirus can also be airborne in a puff cloud loaded with infected droplets generated by COVID sick person. An elementary calculation shows that a $5~μm$ respiratory infected droplet can remain suspended for about 9.0 minutes and a $2~μm$ droplet can remain suspended for about an hour! And social distancing advise of 3 feet by WHO and 6 feet by CDC (Centers for Disease Control and Prevention) may not be sufficient in some circumstances as discussed in the text.
