Towards improved social distancing guidelines: Space and time dependence of virus transmission from speech-driven aerosol transport between two individuals
Towards improved social distancing guidelines: Space and time dependence of virus transmission from speech-driven aerosol transport between two individuals
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DOI：
10.1103/physrevfluids.5.122501
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发表时间：
2020-12-01
影响因子：
2.7
通讯作者：
Stone, Howard A.
中科院分区：
文献类型：
--
作者：
Yang, Fan;Pahlavan, Amir A.;Stone, Howard A.
现在人们认识到，气溶胶运输有助于SARS-CoV-2病毒的传播。在这里，我们改进了现有的空气传播病原体的社交距离准则，这些准则通常是根据距离给出的，对接触时间有模糊的陈述。此外，估计在受污染空间中吸入病毒通常假设环境混合良好，这对某些情况是现实的，但不是所有情况。特别是，我们认为一个地方的休闲互动的感染者和易感个体，都无面罩，占空气流动和气溶胶传输特性的说话和呼吸在通风不良的空间，并提出社会距离的指导方针，涉及空间和接触时间，基于保守的流体动力学模型的相互作用。
It is now recognized that aerosol transport contributes to the transmission of the SARS-CoV-2 virus. Here, we improve existing social distancing guidelines for airborne pathogens, which are typically given in terms of distance with vague statements about contact times. Also, estimates of inhalation of virus in a contaminated space usually assume a well-mixed environment, which is realistic for some, but not all, situations. In particular, we consider a local casual interaction of an infected individual and a susceptible individual, both maskless, account for the air flow and aerosol transport characteristics of speaking and breathing in a poorly ventilated space, and propose social distancing guidelines that involve both space and contact time, based on a conservative model of fluid dynamics of the interactions.