This exclusion distance is based on estimates of the range that have not considered convection flow and atmospheric diffusivity that affect dispersion of exhaled aerosol clouds considerably.

The US Centres for Disease Control and Prevention recommends a 6-foot (1.83 m) separation distance.

Investigating the main virus transmission routes is vital for policy development to curb the spread of the current pandemic. Understanding transmission of COVID-19 infection is one of the key issues the scientific community faces. Keywords: COVID-19 transmission, Viral load, Size distribution, Modelling A metric based on aerosol particle (volume) size distribution and the ICRP lung deposition model is suggested. In realistic weather scenarios viruses can be deposited in the respiratory tract of a healthy individual at up to 200 virus copies in several minutes. Modelling of the evolution of aerosol clouds generated by coughing and sneezing enables us to evaluate the deposition dose of aerosol particles in healthy individuals. The results obtained demonstrate that aerosol particles of sizes from 10 µm to 100 µm that potentially can carry SARS-CoV-2 (COVID-19) viruses travel over 30 m in some atmospheric conditions. The modelling clearly demonstrates how aerosol particle dispersion is influenced by weather and geometry of the environment. Effects of convection flow, atmospheric diffusivity and humidity on evolution and travel distances of exhaled aerosol clouds by an infected person are modelled.

Deposition doses up to 200 virus copies in 2 min were predicted by modelling.Ī fast-computational 3D model comprising fluid dynamics with heat transfer, mass transfer and diffusion of diluted species has been adapted and employed to evaluate dispersion of aerosol particles in various environments.

It was found that aerosol particles generated by coughing can travel over 30 m.

The 2 m Safe Distance concept was examined by modelling of the aerosol dispersion.

Aerosol Particles Generated by Coughing and Sneezing of a SARS-CoV-2 (COVID-19) Host Travel over 30 m Distance.

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