Non-uniform risk assessment methods for personalizedventilation on prevention and control of COVID-19

An overview of SARS-CoV-2 transmission and engineering strategies to mitigate risk

“…In addition to mixing and displacement ventilation, other ventilation strategies can be used to reduce the risk of SARS-CoV-2 transmission indoors. Personalized ventilation is one such strategy that delivers filtered air directly to an individual's breathing zone, reducing their exposure to pollutants and potentially infectious airborne diseases like SARS-CoV-2 [ 69 ]. Personalized ventilation can be implemented through miniature air tanks that can be attached to a user's clothing, desk, or chair, allowing them to control the rate and direction of airflow they receive.…”

Ventilation strategies and design impacts on indoor airborne transmission: A review

“…This research suggested a low ventilation rate for the tandem and high flow rates for face-to-face seating to protect office mates against cross-contamination. The impacts of occupants’ seating model and ventilation rate were also approved in other public environments, such as public transport [ 218 ]. Xu et al [ 219 ] indicated efficient PV design could be a high-performance ventilation system.…”

Exploring the potentials of personalized ventilation in mitigating airborne infection risk for two closely ranged occupants with different risk assessment models

“…The use of PV will create non-uniform air distribution in the breathing zone of human subjects. Models adaptable for risk assessment in non-uniform environment should be applied [65].…”

“…Xu al. [65] found that the PV jet would entrain droplets when it fell within the area accessible to the exhalation of the infector with a face-to-face orientation of relatively short distance, which would the infection risk by using PV. Li et al [39] reported that the exposure risk slightly rose when only provided PV to the infector with a faceto-face orientation.…”