Highlights
• Experimental observation of saliva droplets transitioning into solid aerosols.• Evaporation of acoustically levitated saliva droplets from 5 men and 5 women.• Validation of a numerical model for simulating saliva droplets evaporation.• Solid aerosols < 5 µm are formed from droplets < 21 µm within a few seconds.• Solid residues from droplets may present the highest risk for virus transmission.
Source: Transition from saliva droplets to solid aerosols in the context of COVID-19 spreading – ScienceDirect
