Abstract
The most recent research confirms that airborne transmission may be the dominant mode of SARS-CoV-2 virus spread in the interior spaces of buildings. Consequently, based on some prescriptions that implemented natural ventilation during face-to-face lessons in a university centre, an experimental characterization of several complementary options aimed at reinforcing the prevention and safety of the occupants was carried out. The action protocol adopted was based on the combination of mandatory natural ventilation, a maximum contribution of outdoor air supply in the air conditioning system, and the use of filtering devices located inside the classroom. All the strategies were incorporated concomitantly with necessary compliance with the basic conditions of social distance, occupation, use of masks and guidelines for use and cleaning within educational buildings. The suitability of this protocol was further evaluated throughout the teaching day with students and teachers by measuring the CO2 concentration. The results showed that the measures implemented successfully removed the possible pollutants generated inside.
Highlights
Throughout the current global pandemic caused by the SARS-CoV-2 virus, there has been a significant evolution of the knowledge of contagion
In April 2021, has the World Health Organization (WHO) begun to as-sess airborne transmission, emphasis continues to be placed on the fomite path and large droplets [4]
The experimental study consisted of 12 cases with different configurations regarding the opening of windows and doors, the operation of the air conditioning system with the supply of outdoor air, and the use of a filtration device:
Summary
Throughout the current global pandemic caused by the SARS-CoV-2 virus, there has been a significant evolution of the knowledge of contagion. In the field of interior spaces in buildings, the term bioaerosol includes the droplets exhaled by people which can be between 0.4 and 100 μm and remain suspended in the air
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