Development of a Bioaerosol Experimental System for Virus Stability Measurement

Respiratory infections, such as SARS, MERS, and COVID-19, have highlighted the importance of studying transmission mechanism in indoor environments. Virus stability affected by temperature, humidity or particle size has remained inadequately investigated. A bioaerosol experiment system is developed this study for virus measurement. Virus-laden droplets are generated a Collison nebulizer, afterwards enter mixing chamber, where filled with conditioned air. After complete evaporation, droplet nuclei go through an impactor, only those smaller than cut-off (1μm, 2.5μm 10μm) can finally Goldberg Drum to suspend designed period later sampling Temperature (20℃-40℃) relative (30%-80%) be well controlled throughout experiment. According inactivation mechanism, process divided into initial stage involving evaporation subsequent aerosol suspension stage. Decay coefficients obtained method used evaluation exposure risks environments development efficient engineering control strategies.