Appropriate ventilation volume is effective for virus removal.
Viruses are released with the sneezing and coughing of an infected person. The smaller the particle size of the droplet expelled, the longer it will float in the air and the farther it will travel. The spread of droplets can be controlled with an appropriate indoor airflow plan. In addition, the greater the ventilation volume and frequency, the lower the risk of infection because the concentration of airborne viruses is diluted and the human exposure dose is reduced.
Sources: Architectural Institute of Japan [AIJ]. (2020b). Activity HUB related to COVID-19.
Motoya Hayashi, U Yanagi, Kenichi Azuma, et al. Measures against COVID-19 concerning Summer Indoor Environment in Japan. Japan Architectural Review (2020).