
Longer-lingering droplets are less efficient carriers of COVID-19 virus
Oct. 27 (UPI) -- New research -- published Tuesday in the journal Physics of Fluids -- suggests bigger, short-lived aerosol droplets pose a much greater risk of spreading COVID-19 than aerosol microdroplets, which are tiny particles that linger longest in the air. To better understand the behavior and virus-carrying potential of different types of aerosol droplets, researchers had volunteers breathe, speak and cough into a laser beam, which recorded the size and distribution of the array of aerosolized particles. Advertisement Researchers used a Rayleigh jet nozzle chip to generate the same distribution of droplets. The jet released aerosol droplets composed of 1 percent glycerol and 99 percent ethanol into a chamber. A sheet of laser light running across the middle of the chamber allowed...